Right the public keys will be revealed in each transaction as said above and there is no fear in it at all so I don't see anything to hide in it.They are derived from one way hash function under which you can generate public key from private keys but the reverse is not at all possible.

So @OP you don't need to worry about public key hiding and the only thing you should focus on is keeping your seed phrases secret if you are using non custodial wallets so be safe in that case.

As said by @LoyceV also you should burner address that once you have utilised it for the task or submitted it somewhere use different address from it which will help you more.