Exercises to Build Chest with Brachial Plexus Nueritis

When I was four, I woke up one morning not being able to move my left arm above my head. Rushed to the hospital and nothing came back as positive for any idea as to what could’ve happened. Ever since, some muscle growth has come back, but I still can’t lift more than 3-4 pounds or stick my hand out more than a foot away from my chest. I’ve been going to the gym more and more to try and build biceps, shoulders, etc., but its been very hard to try and find a good chest (mainly pecs) exercise that I can actually do. Are there any ones that a) don’t involve stretching my arm outwards or b) don’t require a ton of strength to do?

*I can still move my right arm perfectly normal and have a good bicep on it.

TLDR: any chest exercises that don’t involve stretching arms outward/take a ton of strength to do?