broken screen – Permanent adb RSA key authorization

My phone screen is broken but I managed to finally tap the allow button for ADB authorization so I can access the device via adb. My question is, is there a way to do this once and never be asked again or backup the RSA which I can then push to the device via adb if it happens to need re-authorization again (since i have a broken screen can’t just tap allow again)

I have enabled do not ask again on this device, but that does not seem to work from past experience and it keeps asking me to authorize of I reboot the phone.

Thanks