I just notified Croatian Wikipedia community via their Discord.

For srwikinews I will try to work on this with @Acamicamacaraca and @Srdjan_m.

Thanks @Zoranzoki21 let me know if I can help with any technical questions or examples of wikis with similar main pages to the desired one. https://fr.m.wikipedia.org/wiki/Wikip%C3%A9dia:Accueil_principal seems to be a good example of what's possible here.

In T246401#5927201, @Jdlrobson wrote:

https://fr.m.wikipedia.org/wiki/Wikip%C3%A9dia:Accueil_principal seems to be a good example of what's possible here.

But not of how: it uses site-wide styles, not TemplateStyles, so style definitions are spread over MediaWiki:Common.css and MediaWiki:Mobile.css, and it even causes flash of unstyled content on mobile.

In T246401#5927388, @Tacsipacsi wrote:

In T246401#5927201, @Jdlrobson wrote:

https://fr.m.wikipedia.org/wiki/Wikip%C3%A9dia:Accueil_principal seems to be a good example of what's possible here.

But not of how: it uses site-wide styles, not TemplateStyles, so style definitions are spread over MediaWiki:Common.css and MediaWiki:Mobile.css, and it even causes flash of unstyled content on mobile.

Thanks for pointing that out! Looks like https://meta.wikimedia.org/w/index.php?title=Main_Page&action=edit might be a better example - that uses TemplateStyles and a responsive 2 column layout.

We definitely need more time to fix this at rowiki, since apparently I'm the only one with both the knowledge and access to be able to fix the main page and I currently don't have more that 5-10 minutes at a time to devote to wiki. I would appreciate it if you could push back the deadline to Jun 2nd or later in the hope that I will be able to look into the design on a national holiday.

In T246401#5936336, @Strainu wrote:

We definitely need more time to fix this at rowiki, since apparently I'm the only one with both the knowledge and access to be able to fix the main page and I currently don't have more that 5-10 minutes at a time to devote to wiki. I would appreciate it if you could push back the deadline to Jun 2nd or later in the hope that I will be able to look into the design on a national holiday.

Noted.
Looking at your wiki, I think this CSS added as a template style will get you most of the way there without interrupting display on any other wikis:

body.skin-minerva table, body.skin-minerva  tr, body.skin-minerva  td, body.skin-minerva  tbody {
  display: block !important;
  width: 100% !important;
  box-sizing: border-box;
}

But you'll also need to add classes to the headings such as Conținut recomandat to apply the same rule above to those two.

Thanks @Jdlrobson you suggestion worked with minor changes. If you also have suggestions for the bottom 2 sections (categories and other projects) which render badly, it would be great. :)

Easiest short term solution would likely be to add a nomobile class to those elements. It will hide them on mobile.

@bearND can you confirm that this change will not break the existing feeds, since some of that is based on markup from MobileFrontend?

In T246401#6109943, @Jdlrobson wrote:

any ideas on how we can get more engagement with this task? Projects main pages currently hide lots of information to work around this problem and I'd really like to work with community members to help update them.

Maybe leaving messages on affected main pages’ talk pages and/or affected wikis’ village pumps may draw more attention to the issue.

Thanks for the suggestion @Tacsipacsi - is that something I could use MassMessage for?

I think you could in theory, but I don’t know if it can add pages to your watchlist—which is quite important IMO if you want people to reach out to you. Of course using MassMessage and getting those pages on your watchlist in some other way also seems to be a viable solution if MM can’t handle the watchlist.

can you confirm that this change will not break the existing feeds, since some of that is based on markup from MobileFrontend?

@JMinor The Wikifeeds endpoints should not be affected since they don't actually parse the main page directly. Instead they either parse template pages that get transcluded by main pages or, for TFA, use a Special page.

Putting a larger number of Village Pumps on one's watchlist might not the best way to keep an eye for replies, though, there's too many other things going on, too much watchlist noise. If you decide to go with MassMessage, one solution could be asking (in bold) that people comment in your preferred location (Phab?), but if they for some reason can't, on your [[talk page]] on the local wiki. That way, you'll be notified but they don't have to leave their home wiki or know how to ping you.

@Jdlrobson Although I'm still working on the itwikivoyage homepage, could you set $wgMFSpecialCaseMainPage = false to disable the different mobile view?