There is currently no option to import the themes. The current theme of UE5 is very dark for my eyes and annoying but thanks for allowing me to modify I can put a lighter version, the problem that I have found is that I have to manually put the json in the engine folder… if I have multiple versions of the engine installed I have to copy and paste in the respective folders each time.
The fastest way would be to add a button next to it to import the json.
Other ways:
Jetbrains editors have multiple options to save preferences and themes.
1 - The possibility of saving the theme-preferences in a Git repository
2 - That epic games save them in the existing login accounts so each engine would have the possibility to connect and apply the theme-prefernces.
There are also things that it does not currently allow to change, such as the Unreal Engine logo for the light version.
Thanks!