It would be nice if Wallet worked. A workaround for probably a pretty small subset of Graphene/degoogled users is to use a Garmin watch compatible with Garmin Pay.

I may very well stick with splitwise given that most friends are familiar and there are nice features. Just wanted to know if a Foss alternative can even come close.

Great, definitely more of a learning curve compared to splitwise, but looks promising. Thank you.