Can someone explain to me what's going on here ?? recently I had to replace 3 bulbs (left and right blinker/signal and right top standard / little bulb) i can't compare both sides. Looks a bit like a mess. I will add pictures

Left side

Right side

Somebody coupled in a
'towing trailerboard'?

Yep, given the presence of "scotch locks" those horrible blue blobs of plastic, someone has fitted a towbar.