Note: fails not only during transclusions, but also when just linking:

https://en.wikipedia.org/wiki/Special:RecentChanges/tagfilter%3Dblanking (WORKS)

https://en.wikipedia.org/wiki/Special:RecentChanges/tagfilter%3Dpossible_vandalism (DOES NOT WORK)

Converting _ to + or %20 also does not work.

In T147922#2708609, @Xaosflux wrote:

Note: fails not only during transclusions, but also when just linking:

https://en.wikipedia.org/wiki/Special:RecentChanges/tagfilter%3Dblanking (WORKS)

https://en.wikipedia.org/wiki/Special:RecentChanges/tagfilter%3Dpossible_vandalism (DOES NOT WORK)

Converting _ to + or %20 also does not work.

Good spot @Xaosflux - do you have any idea if this has ever worked? I faintly recall being able to link to RecentChanges with tags but I could be mistaken

Use the "modern" way for transclusion:

{{Special:RecentChanges|tagfilter=Тексерілді деп белгіледі|days=30|limit=1000}}

In T147922#2708609, @Xaosflux wrote:

Note: fails not only during transclusions, but also when just linking:

https://en.wikipedia.org/wiki/Special:RecentChanges/tagfilter%3Dblanking (WORKS)

https://en.wikipedia.org/wiki/Special:RecentChanges/tagfilter%3Dpossible_vandalism (DOES NOT WORK)

Converting _ to + or %20 also does not work.

It is possible to link to recent changes with tags, but you have to use the non-pretty version of the URLS. @Samtar
Examples:
https://en.wikipedia.org/w/index.php?title=Special:RecentChanges&tagfilter=Section+blanking (works)

https://en.wikipedia.org/w/index.php?title=Special:RecentChanges&tagfilter=Section%20blanking (works)

https://en.wikipedia.org/w/index.php?title=Special:RecentChanges&tagfilter=Section_blanking (does not work)

In T147922#2709490, @Umherirrender wrote:

Use the "modern" way for transclusion:

{{Special:RecentChanges|tagfilter=Тексерілді деп белгіледі|days=30|limit=1000}}

I just tried but doesn't work. And following variant:

{{Special:RecentChanges/tagfilter=Тексерілді%20деп%20белгіледі,days=30,limit=1000}}

doesn't work.

In T147922#2713519, @Arystanbek wrote:

In T147922#2709490, @Umherirrender wrote:

Use the "modern" way for transclusion:

{{Special:RecentChanges|tagfilter=Тексерілді деп белгіледі|days=30|limit=1000}}

I was tried but doesn't work.

{{Special:RecentChanges|tagfilter=possible vandalism}}

works on enwiki, the other example was for kkwiki - see the pipe instead of the slash in the code

The change I proposed enabled tagfilter for transclusion like {{Special:RecentChanges/tagfilter=..., however, I strongly prefer the solution proposed by @Umherirrender. ENabling tagfilter was just a solution so that it works like any other possible parameter (which already should not work with transclusion). So, I would say this task is a WONTFIX (bugzilla times)/Declined (in phabricator times) :)