The cooling unit is just fine or the freezer would thaw.
The unit simple reached the limit of cool.. The "Myth" (Global warming) is now at the point where absorption units can be overcome.
Thigs that might help
SHADE!!! This is the #1 way to help it Shade the area of the RV where the Fridge lies. Awning. Pop Up Shelter. anything to shade it.
Cleaning. At the top of the fridge. outside, is a "heat Exchanger" (The Radiator on your car or coils (Both condenser and evaporative) on an A/C are heat exchangers and this is not different in construction... Crud can build up under it.. Remove the top cap and blow down.. Keep the pressure low and volume high if you can (Do not want to bend fins) Open the lower access panel too before you do this.
A fan (or two) blowing UP through the heat exchanger.
NOTE it's a bit pricy but they sell a replacement "Cap" (for units that "Exhaust" Through theroof) Solar panel and solar powered fan to Suck it up