All in all, i guess something like Fedora Silverblue (immutable) with some remote management software?
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There are plenty of RMM tools/companies that support Linux platforms.
Nixos?
There is Zorin Grid (https://zorin.com/grid/) that I think is what you are looking for. It does not exist yet (and it has that notify button for a long long time, but there can still be hope it is not dead and it will come out one day.)
That's the neat part, you don't.