I agree, it does appear to be a gel coat issue.
If you fancy a trip to Plymouth I can recommend Spencer from Anything Fibreglass, he repaired some minor damage on a boat I used to have and I wouldn’t hesitate in recommending him.
He is based in Yacht Haven Quay which is close to Morrisons at Plymstock and benefits from a very good cafe on-site!
https://anything-fibre-glass.business.site/