The reason for this is copyright. I'm surprised guitar tablature is as easy to find as it is.

https://clara.imslp.org/

The ultimate goal of the IMSLP is to gather all public domain music scores, in addition to the music scores of all contemporary composers (or their estates) who wish to release them to the public free of charge

IMSLP currently has 231,406 works, 755,950 scores, 83,070 recordings, 27,907 composers, and 2,027 performers.

not really a good solution, but it might honestly be worth a look to see if you find any public domain copies of sheet music on archive.org or something like that, probably won't be very new at all. But i imagine it would be just about the lowest effort way of getting sheet music. (just hope that it hasn't changed in the last 100 or so years lol)