

Yes, but this suit about a different matter (access to source code) which is a user right in the license. It’s the whole point of the GPL. In this suit the users (ie. The buyers of the devices that have received the binary distribution) obviously have standing.
The problem with relicensing is that the “authors” of a creative work (remember, this is copyright law) are changing the terms of the distribution, and the authors are allowed to do that. The issue at hand is whether the person doing the changing of the terms is allowed to make this change on behalf of “the authors”.
The users may be impacted by this decision, but they are not a part of the decision making process. Hence, no standing.
What you need in a relicensing is someone that asserts (co-) authorship of the work. That’s a much taller order.
The terfs will not be missed.