Unless you were aware of this term, and the authors intended pronunciation of it you would pronounce it as letters 'S-Q-R-L'.
No I wouldn't. When I looked at this page the letters SQRL stood out because they were capitals and a different colour. I read them as "squirrel".
My wife is not a programmer and so not familiar with SQL and has neither heard nor read much of about it nor knew that it was originally called SEQUEL before a trademark dispute forced a name change. On seeing materials of mine with the letters she at first pronounced it "squeal". Now she pronounces SQL as "squeal, oh wait that's not right, what is it again? (There should be a language called squeal)".
People are used to reading words, and they'll very often arrive at them given only half an opportunity. It's realted to teh way msot ppl can unedrtsand tihs.
But that is not how the author intends.
That only goes so far either way. People tend to only respect coiners wishes so far. Likely some people will pronounce SQRL ess cue are el, while conversely if the creators insisted that was the correct pronunciation some people would pronounce it squirrel.
(And if they insisted SQRL was pronounced "donkey fish" they wouldn't have a chance).
So, if these terms that would clearly be initialisms in any normal sense of the word
It clearly is an initialism because it comes from initials. NATO, laser and scuba are initialisms for the same reason. It's not exclusive to being an acronym.
but have had a pronunciation forced upon them,
Actually, how do you know the note on pronunciation wasn't the creator conceding to others?
can these be referred to as an Acronym?
Yes. There are definitions of acronym that exclude those pronounced as spelled-out and definitions that do not, but either way, yes.