I race in an offline league, in which the participants like to spectate from alt accounts,, we can't because we can't use filters and only our pro tier is displayed in the 10 available.
Hi Andy. This is noted on the list of areas requiring attention.
As a suggested workaround for now, try adding your offline account as a friend to your spectating
Account. I’m not sure if this works in the new UI but on the old one you would be given an option to spectate a friends race. It’s worth a try. (If that doesn’t work please report it back and I’ll see if I can think of anything else to help)