I have been driving my 07 TL and recently started noticing that I am getting a lot of rattle on uneven and bumpy roads and not only that but when I hit potholes, there is this super loud bang. the Bang sounds more on the Left side than the Right. As for the rattle, I was thinking it could be my UCA. and then for the loud bang, I was thinking that it is probably my stock suspension is just worn out but wondering if anyone has any idea on what it could be.

the TL is known for interior rattles.
as far as the exterior rattles, your guess is as good as ours. check front end suspension for play

Check your rear sway bar bushings. Mine wore out and made a loud noise too, replaced them and all good now!

I am going to look at the rear sway bar bushings today to make sure its all good, and I will pull the trigger on the UCAs and the suspension over time to see. I am going to ask first one of my boys that works for Acura to take a look first to see if he can diagnose anything exact so I am not spending on anything unnecessary kind of tight on money right now due to paying for school lol.