would you have an axample of so something like this or what it’s called?
In the context of your query and it relating to children aged 18+ they're just called unit liked savings plans. Set the policy up in the children's own name, choose a fund, and direct debit from parent's bank account.
All providers in the market, bar Royal London, have products, with AMCs varying from circa 0.90% to 1.5% pa depending on the type of service you want/need.