I have a big thread with inversion in the case when the sentence has an auxiliary verb, for example :
Not only he might have a problem with this issue, but also he might have problem with other issues.
I don't know how to invert it here in the first part starting with Not only !
I will be so thankful of any help.
Here's one solution:
'Not only might he have a problem with this issue, but he might also have a problem with other issues.'