@pubic_assistance Actually, no. FTM means assigned Female at birth Transitioned to Male (or Female To Male) Generally meaning, now using masculine pronouns (i.e. he/him). While some transmasc people use they/he or they/them, rarely would someone identifying as FTM use she/her pronouns, and most would find it offensive. It is possible, but pretty unlikely unless this person specifically shared they still use or don’t mind feminine pronouns.
A quick google search would probably help you, if you need some additional education. Ah, hell, I’ll even do it for you in case that’s too much effort for you to exert for trans people. If you did it on purpose because you don’t believe trans people exist or deserve to have their gender identity respected, then that’s just gross behavior.