Where can I search for lists??

I don't think you can search for lists specifically but you can search by tag from here:
https://www.mangago.me/tag/Multiple+Stories/
you can't combine tags though
for mobile I think the search bar for more tags is on the top, and on desktop its on the left

https://www.mangago.me/genre/Comedy/
Through this page you can search by genre and combine genres+ exclude genres

Thank youuuuuu (●'◡'●)ﾉ

Thank you so much (⌒▽⌒)

Here you go dear, here’s the page Just type whatever genre or tag you’re looking for, and all the lists containing that item will pop up

https://www.mangago.me/listtag//

Thank youu