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So as of recent I've been experiencing a vibration in the brake pedal at a stop,
its the 3 speed auto, if I'm in drive and at a stop ill feel the vibration in the pedal and it can change in intensity at random.
it can become especially apparent when the ac compressor turns on.
the car isn't undrivable but the issue definitely raised an eye brow.
if i am in park or neutral the vibration disappears but if i go into drive or reverse it appears

You could have a rubber mount that is allowing the engine to rock to far forward or backward or it allows the mount on the motor to touch the (otherwise isolated by rubber) mount on the north south bar under the engine/transmission. Not usual that the timing belt mount or transmission mount right side, go bad this way.