In my opinion, there is all the functionality needed for a true marketplace:
- payment in various modes (on-chain, lightning, cashu)
- accurate shipping details
- future possibility of self-hosting your own instance 

You can read the roadmap here:
https://github.com/PlebeianTech/plebeian.market/blob/b305160ea8a8763ab97b1c34c0a9572f1ffee8e5/docs/roadmap.md