naxos (old classical label, used to specialize in good low-cost releases, they probably still do) has a bunch of playlists on apple music
listening to one called "focus fuel"-- for work obviously
...oh hm just went to look, bunch of good stuff on their website also
https://www.naxos.com
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eta: oh, same thing is on spotfry
https://open.spotify.com/user/naxosofficial