I’m a little over a year post op on a pec tear myself.
I’m suprised you waited a month for surgery. Generally, you want to get these done asap or else the atrophy significantly impairs the outcome–depends on the exact situation though.
I still haven’t barbell benched, but I have done dumbbell exercises. Mostly floor presses, then at about 10 months post op I started doing them on a bench. Otherwise I’ve tried to ephasize closed chain chest movements more. Blast strap push ups, Power pushup 2 (band resisted push ups, Google it if interested) and dips.
One thing I’ve seen recommended over at Elite FTS is barbell floor presses with chains. Haven’t done it myself, but I recall it being said that this has been used by many guys coming off a pec tear.