Can someone remind me how I can check what version of an idle map I'm playing? Just started a new map and I'm not sure I upgraded to the new version before hand.

If you started in web browser, it is v14 https://www.warzone.com/blog/index.php/2021/02/update-5-08-clan-updates/

Nope, IOS app.

I think there should be something on-screen explicitly saying what version of the map you're running. Similar to if you were running Muli's userscript on PC, where it shows you what version it's on in the lower-right corner of the screen.