Pets with mounts?

[Broccoli]

I noticed this morning that Toenail and Lil' Abom both get on a ground or flying mount, as applicable for the zone, when you mount up. Do any other pets do the same?

[Quintessence]

Shadowlands added *a lot* of battle pets that mount up when you do, but I'll try to list them all. Lmk if I miss any

Prior to Shadowlands:
Feline Familiar
Thistleleaf Adventurer
Argent Squire / Argent Gruntling (only if you've purchased and used Argent Pony Bridle)

Added in Shadowlands:
Sinheart
Ruffle
Lost Featherling
Steward Featherling
Fodder
Lil'Abom
Mu'dud
Toenail
Mawsworn Minion
Rook
Mord'al Eveningstar
Gilded Darknight