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Do you/have you tried to use Karabiner(?) Elements? I use that for easily switching between profiles for my different mech keyboards; some US layout, some UK/ISO, some with native Mac support, some without... I have the added complication of I use the ABC Extended layout (US based) so some keys aren't where I want them to be when I change keyboards. Karabiner has added some consistency to the madness!
Ahhhh no, not proper modifier keys for Mac but the return is correct. AliExpress of all places!