When we had our class c with the Dometic fridge I found that placing aq small battery operated fan like this always helped with cooling.
https://www.amazon.com/Increase-Cool.../dp/B07L22DMYR
We also had the freezer cold and fridge warm situation before we included the fan. Seems internal air circulation was the culprit.
Note, the Amazon fan is an example only and ours cost about 9.00 through Camping World.
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