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As u/TMun357 mentions, a major focus of the upcoming 0.8.x versions of Foundry (0.8.1 specifically) will be to address the audio in general, and I think playlists in particular. You can find details on Foundry's GitLab Milestones page, and take advantage of the Issues page to suggest any features you don't see listed there.
Maybe not the answer you're looking for, and it'll require you to buy hardware, but you could take a look at my Material Deck and Material Keys modules that use an Elgato Stream Deck and Novation Launchpad, respectively, to control and display various Foundry functions. Both allow you to play playlists or individual tracks by pressing a physical button, and both show which playlist and track is playing (through LEDs for Material Keys, while Material Deck can display playlist and names). As a bonus, you'll also be able to do a lot of other cool stuff :)