I have tested yet again.
Tracked Pets > Collected & Not Collected checked.
See file “image_2022-08-14-182817956.png”
Tracked Pets > Collected unchecked and Not Collected checked.
See “image_2022-08-14-183011364.png”
Clearly it’s working because I have already collected the Stormwind Rat.
I am going to test on another account the quality of the battle pets, because I have three types of Stormwind Rat, poor, common and rare all at level 25.