Is this a bacterial infection?

Google says it’s a bacterial infection. I just inspected her roots and repotted and there didn’t seem to be any root rot. Should I remove these leaves? How worried should I be about my other plants? I was originally only worried cause she looked like she was losing color. She lives under a grow light next to a (partially blocked) west facing window in the PNW winter (so no real sun from outside for a bit). I just moved her away from the other plants. The black dots don’t move - they’re definitely leaf damage. She’s also producing baby leaves. I water after I test soil dryness (about every 2.5 weeks in winter), and she has drainage.