1361
Simple trick
(programming.dev)
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I think per connection is a GrapheneOS thing unless I'm wrong
Samsung's OneUI does this by default for all connections .
I don't have a Samsung, but I'm pretty sure that's still randomised per network, per connection can be enabled in the developer options somewhere.
I have a Samsung and it's per network, even if you forget and rejoin it keeps the same random Mac address. You need to enable a developer setting to have it randomize when you join.