If the plane requests flight follwing, we can treat it as VFR aircraft, and it means its landing sequence is arranged by TWR. You can h/f the plane to TWR about 7-10 nm out of airport in order to allow TWR to have sufficient time for sequencing .
If the plane takes ILS, though VFR a/c can still request ILS approach practice, we should have our job done till issuing “cleared ILS Rxx approach”. If no more fine tune required, you can h/f to tower after issuing approach clearance.
The funny thing is that some TWR controllers don’t really know this, and they just send guard message to pilots and make the plane leave the frequency before getting their ILS approach clearance. But there is no way to tell tower don’t do so.