I think that Umbrel is close to that:
https://umbrel.com/
That's too general-purpose system/device. It would be better to go the route of maximum focus purely on accepting payments. Have a solution for everyone, both for e-shops (like Alza, SatoshiLabs), and also for small and large IRL retails.
Maybe it would make sense to include some kind of POS system in the portfolio ala https://www.sumup.com/
Maybe it would make sense to include some kind of POS system in the portfolio ala https://www.sumup.com/
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