Because your transaction is non RBF, you can not use RBF to bump fee rate.

There is an option for you in this case, import that wallet to Electrum wallet and use Child Pay For Parents.

• [Guide] Use CPFP if your stucked transactions from blockchain.com wallet
• [Tutorial] Getting a low-fee transaction unstuck by creating a CPFP with electrum

With Electrum wallet, download it from an official website but if possible, it's recommended to verify the download before using.

• [GUIDE] How to Safely Download and Verify Electrum
• The paranoid user's security guide for using Electrum safely.