rear passenger door wont open 😭

I suspect it is the door handle lever (metal bar between back of door handle and lock) that needs readjusting. When I over adjusted mine on the front I had this problem. the only way to release it was to get to the lever and disconnect it - the lock will then clunk and then can be unlocked. I think the lock hasn't been able to lock fully as the lever is jamming the mechanism but its locked well enough to be unble to open door.

I got to mine using a coat hanger with a hook on the end - with the door drip pulled back a bit to get it in and then fish about for the lever and then give it a sharp jank. it may be hard for you as you haven't had the door trim off to see where this item is exactly and it may be hidden behind plastic covers. I had not fully refitted my trims and although not able to remove them with the door closed the screws were not fitted so was able to pull it up and give myself a bit of space.

have a look at my replies to someone else who had problem with front door handle being sticky or something similar few months ago - I posted quite a lot of replies on that and its all the same sort of thing. I also started a post could be at least a year ago when mine did this for the first time. hopefully something there will help you but I fear you will have to remove that door trim, even if only a bit. However I believe replacement door trims are expensive so try to avoid too much damage.

inside.

you need to pull the inside door trim upwards off its lip so you can pull it back a bit. may be hard as I guess the screws on the sides of the door trim are in place.