this was their answer…
|### Coinbase Support [email protected]|Tue, Nov 23, 2021, 7:14 PM||![]
Hi Rafael,
Since we don’t currently support this network, we can’t recover them. It’s always important to check the list of assets and networks supported by Coinbase before sending any funds to a Coinbase account.
Although we currently don’t support this network, if a previously unsupported network becomes available on Coinbase, we may be able to credit these funds to your account in the future.
Thanks for your understanding"