It could be tricky to init fbq many times. Another way is to add params to user is set user data:

window.fbq("set", "userData", parameters);

where param could be:

{
      'em':'[email protected]', // Email
      'external_id': user12345 // User ID
      }

Maybe this helps: https://developers.facebook.com/docs/meta-pixel/guides/track-multiple-events