I was able to scan 40W with the regular and T2MI drivers. I went for blindscan first. And then after adding, verifying them in my satellites.xml file. Performed a channel scan. The regular driver would not display Canal Trece and Canal Trece +. Switching to the T2MI driver does. So that answers the question
Are the drivers only for scanning or to also display the channels.
Rather than jumping around in the TNAP menu swapping drivers and rebooting. A handy way is to put them all in the same
/lib/modules/5.15.0/extra
directory and append the names with the according functional purpose.

Currently the regular driver is used and the name remains avl6261.ko
The T2MI driver is waiting to be used after appending the regular driver something easy to remember. avl6261.ko.regular (for me).
And the .t2mi edited out. A reboot of the receiver then uses the driver it expects.
At one time I had all of the drivers in the directory appended to try out. Not sure if the TNAP drivers directory is the same (this is OpenViX).
Further. Adding the transponders to the satellites.xml does require care. They must be entered exact. In Notepad++ there is a plugin named XML Tools. In that menu is a Check XML syntax now function. Any errors will be highlighted. In View>Show Symbol. Check all of the options. Hopping from driver to driver with a known transponder to check becomes quicker.
As you might notice. 4000 has both H&V (L&R) polarities. Duplicates come from me not using a depolarizer.
