Hey Marshyy3003, great question! Unfortunately, I can't say for sure if Wurst is compatible with the BetterMC modpack. You might just have to try it out and see if it works.
As long as you are using the Fabric version of BetterMC, I don't see why it wouldn't work. However, large modpacks can be a little unpredictable when it comes to compatibility.
That being said, compatibility with other Fabric mods has improved significantly with the recent update to Wurst 7.35.2. The update removed a Redirect mixin that often caused conflicts with other mods.
I hope this helps! Give it a try and let me know how it goes.