Does the ability Aroma Veil protect allies in a Tera Raid?
Yes it does. To protect yourself from threats that can stop you with you plan, Aroma Veil is one option. You can also be able to use Misty Terrain, which blocks these status moves too.
Here's a Pokemon moveset that I found which can help. Credit to Drgnfiv on reddit for this moveset
Ability: Aroma Veil (blocks Taunt and Encore for the ENTIRE team) Lvl 100, EVs: 252 HP / 144 Sp. Def / 112 Speed (Speed Stat = 254 to outspeed Gengar and use Misty Terrain) Calm / Careful Nature Mud Slap (to lower accuracy) / Snarl (to lower Sp. Atk) Howl (to raise the team's Atk) / Psychic Fangs (to break screens) Helping Hand Misty Terrain (to block status - remember it doesn't work on teammates that are Flying types or are Levitating)