Thanks for letting me know. I used Coinbase centralized wallet. Maybe I can get in touch with CB anyway.
Best Regards and many thanks,
The centralized Coinbase wallet(Coinbase exchange ) does not have a feature to do CPFP unless you use their self-custody wallet with seeds backup that you can import to Electrum and do CPFP transactions.
Coinbase support can't able to help you if you use the centralized wallet so the only thing that you can do right now is to wait for the mempool to become less congested.