To add to what Sendu and Jack said, I believe Trading212 will always intend to direct its users towards profit-making CFD products, because otherwise is makes no commercial sense to offer completely free service, which even Freetrade, as much as they cut out the middlemen and save on costs, will never be able to do.
The issue here is that in the long term you save £36 per year on ISA costs, but if you get into the “get rich quick” trap of Trading212’s core business model, the CFDs, you may lose significantly more. The following is from their website:
76% of retail investor accounts lose money when trading CFDs with this provider.