I have created a form in Excel, and tested it on XLSForm Online v2.x at getodk.com. However, I used 'relevances'. When I test it on XLSForm Online v2.x, all the questions come up, regardless of the relevancies, and also the constraints aren' applied.
Do these features work on the test, or maybe I have not done them properly?
Welcome to the ODK forum, @evanshart! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a picture as your avatar because it helps build community!
Constraint and relevance should work as expected when checking a form on https://getodk.org/xlsform
Can you attach your form here for troubleshooting?