Is there a patch allows Growth Rates to be seen in FE6?

Yes, but I don’t install it onto hacks without the author’s permission.

Project ember would use a similar installer to this:
https://github.com/Veslyquix/SRR_FEGBA/blob/main/HackInstallers/LynsBizarreAdventure.event

I included instructions for myself in case I forget:
https://github.com/Veslyquix/SRR_FEGBA/tree/main/HackInstallers#readme
but I don’t want to help people self randomize things that the authors don’t want randomized, as I think it’s disrespectful. You could try asking the author for permission for it to be self randomized if you want.