high idle

if you had broken motor mounts replaced then it is likely thee is a vacuum line off or broken etc. check for that we have no diagrams of that car it may be a large line like maybe going to vacuum booster.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

car still running rough while idling in gear but not in park or neutral. still high idle but better since cleaning throttle body. what are the odds of when the motor mounts (or last one) broke the timing chain jumped a tooth which would explain it in high idle when it wasn't before. please advise

don't think so timing chain is inside engine if a belt maybe but would be a long shot. scan for codes a mechanic would easily tell if a timing belt due to codes.

but the check engine light is not on doesn't it need to be on to scan for codes

not really one other thing is to check for a vacuum leak like a hose off/broken due to broken motor mounts and clean throttle plate on both sides and iac hole with choke cleaner see link.
https://www.2carpros.com/articles/throttle-actuator-service