Separate from that, it seems like it'd be easy to add page creations to the list of thankable log types, but harder to redirect the thanks to the first revision as requested in the task description.
@Catrope Our work on log entry thanks is long done. It's quite straightforward to add a new log to the list. You'll notice that not all log types are in the list - there are a few conflict cases where community members or Anti-Harassment had concerns. There's discussion in the epic and subtasks.
By default the notification links to Special:Log with the logid of the log that was thanked as a param. Example. Definitely trickier to link to the first revision.
@matej_suchanek how important do you think it is that the thanks notification links to the first revision of the page created?