Isn't the original APL the only lang that uses actual Unicode symbols for operators?
That seems highly unlikely. Do you have a source, or are you sharing speculation as fact?
It’s more likely that APL symbols were included in Unicode as part of its mission to unify all the world’s scripts into single code set.
eg, instead of "echo yo >> file" you would "echo yo ≥ file"
Of course, supporting Unicode variable names doesn't mean a language supports Unicode anywhere, but it's a starting point for historical research at least.
I used to think that Lisp was bad, with its "God coded the universe in Lisp", then I read only the first part of your sentence, and was "Woha, so APL predates thought?!"
In the Raku Programming Language there are several non-ASCII operators, although each of them has a pure ASCII equivalent. Some examples: ≤ vs <=, ≠ vs !=, ∈ vs (elem), etc.
The full list: https://docs.raku.org/language/unicode_ascii.html