It varies. My experience was paying nearly £200 to fly on a tired Q400 to NQY and still need to add bags and snacks. And at the end Social media was full of people who had flown out with no problem and then another airport said their bag was too big and charged them £50.
The biggest problem will be when someone says “I’m thinking of booking Flybe” and then the other person says “didn’t they go bust?” And they will google Flybe bankrupt or whatever and get scared of booking with them.
Not insurmountable but an extra expense. Hopefully they have deep pockets. If they do there has probably not been a better time to launch with airports desperate for pax.