It looks like a machine problem, I have a mbp 2019 quad core i5 and is super slow in the sample projects. Yours looks a little bit older Maybe you can try with a new empty project to see if that works, and then proceed with the 4 projects in the documentation of visionOS

have not tried but I’m pretty sure this will fail since firebase package is built for other frameworks, not visionOS however you can check if tweaking the pods project may help to target them to your new target

Hey! For anyone in the future, the solution to this is to add a buttonStyle modifier to the button :) .buttonStyle(.plain)