I’m pretty sure most musicians could work it out
I do it a lot, first time through I find the main chords, second time through I’ve got most of the chords unless they’re unusual varioations. Third time I’ll have worked out what key(s) it’s in and be capable of adding a few pentatonic licks. Then I get more familiar with the chord sequence and can start adding more bluesy notes. if I want to learn the solo it’ll take days, weeks, months or never depending on the complexity.
Someone on here put up a backing track for us to play over on the guitar thread, half a dozen quite competant guitarists weren’t sure what key it was in or what some of the chords were.