FYI Moneros privacy is quantum safe if you don't publically share your xmr address. Use quantum-resistant channels to share your address like SimpleX, Signal, or even mail/in-person
But as far as what is being done about it, the newest upgrade FCMP brings perfect forward secrecy which means even if a quantum adversary breaks a specific transaction it cannot retroactively decrypt past transactions
Comprehensive solutions are also being worked on:
https://gist.github.com/kayabaNerve/e5b262c5efefcfcfa32748a0d99bc0e1#the-future