when i use the latest version with rei and mythic metals, no recipes appear in rei for the metals.

There is a lot of missing information here.

• Are you using a modpack? If yes, which one?
• Are you sure you have installed REI and not JEI?
• Are there any errors in your log?

In general, please send us your latest.log so we can have a stab at finding the problem
Cheers

Considering REI works fine in our testing, and the lack of a response, I see no reason to keep this issue open.
If you are still experiencing issues with REI, please provide more information as described above.