Yes it is possible to rollback the token from bep-20 to erc-20 as it will be the same wallet and if supported by the exchange you will definitely get it back however many exchanges have a rule that if you send wrong wallet address or use wrong bep-20 or erc -20 it will be lost forever, i used to trade and exchange does not support bep -20 and i lost that amount forever mine, especially this we have to be very careful if we don't read it carefully it will be very easy to lose money and very difficult to get it back.
As far as I know, there is no such thing on Coinbase but maybe I'm missing information or anything that leads to it, because I haven't used Coinbase for a long time.
but maybe when the OP contacted the team they might be able to help with that even though the odds are 50:50.
and what you say is very true, the exchanges here are so many that they can't even be counted on the fingers even in a matter of seconds. and when we have made a mistake in making a transaction, following it will be very inconvenient and requires time, thoroughness and a careful and careful attitude may be very suitable to be used as a warning and advice so as not to repeat the same thing