Unfortunately, Migration Tool does not support migration since Eletron subsystem was introduced.
So, to do migration you need to have cli-scripts to setup your configuration from scratch. In case you haven't CLI scrips yet (for example used UI for the configuration) - profilecloner
can be helpful to do export current configuration : https://github.com/tfonteyn/profilecloner
Hope it will help :)
BR, Sergii Kostenko