Kiwix worked for me. IIRC there may be difficulties opening an archive that was downloaded outside of the mobile app, but archives downloaded in-app were fine.

For the mobile app I used one of the smaller Wikipedia subsets, since I didn't want to take up too much space on my phone. The full offline Wikipedia download is saved to my laptop.

Just downloaded. Doesn't seem to want to download Wikipedia on my phone, it says "detecting if filesystem supports 4gb files"

It works perfectly for me, both on iOS and macOS.