How's the iPhone experience on Google Fi in late 2024?

I've been a long time Fi user on the Pixel line of phones, so I've always gotten the gold standard of service from Fi. My wife is an adamant iPhone user. We want to port her over to my plan, but I was hoping to get some recent feedback from anyone using a modern iPhone (just bought her a 16) -- All the things I find on Google are months to years old. If this is you, how well do the iPhone features (Visual voicemail, iMessage, RCS, FaceTime, 5G, etc) work for you on Fi?