So this is labeled as the Timberline Gondola and appears on the map as if it already exists, but it does not exist. It is proposed and being planned, but has definitely not been built or even been started. Am I reading something wrong? I’ve never learned how to make or propose corrections here.

With apologies, I am not very familiar with how to use OpenStreetMap, so I am unable (and in fact probably shouldn't) edit the actual map. But, I will place a comment here.
Basically, the section of trail I've marked here (that runs from Ramona Falls, across Muddy Fork, then back to the trail junction that is just past [east of] Bald Mountain) is currently closed, and has not in recent years been considered part of the PCT. However, I don't know enough about how OSM works to say that it is definitely NOT part of the trail - perhaps it is, and remains so, but with a re-route that is also labeled (correctly) as the PCT. This would be the section that runs along the Sandy River, and then up to that junction near Bald Mountain.
This section IS normally and recently considered part of the Timberline Trail, and is labeled correctly as such, but it is currently closed and re-routed along the route of the PCT, due to extensive timber blowdown that is not expected to be fixed for a number of years.
I'm writing this because on my Gaia GPS app, this section is labeled as PCT, which is incorrect and misleading. They say they get the data from here, and label it as such since it "has a PCT relation set." Glad to help further, just don't know how!

Newbie here, so please pardon my ignorance of this process.
On some map layers (or in some map info), this spot is mislabeled as "Leuthold Couloir." For example, when I search for it, it shows it right here. This is 100% an incorrect placement for this label. Leuthold Couloir is a distinct gully that is a popular climbing route, and it is north and slightly west of here, just south and right beside the feature correctly labeled Yocum Ridge.
Notably, it is labeled properly and in the correct place when I go into the "Edit" mode in my web browser. Sorry, I don't know how to make this edit myself. Please contact me if you need more information. - Josh (jlawrence10 [at] mac.com)

I’m new at this, and can’t figure out how to add the correct trail, but there is a recent and major re-route right here, and the trail shown here is closed for restoration, at about this point. The re-route is obvious, and is marked by new wooden stakes. It runs north of this trail, ending up at about the same point on the ridge south of South Early Winters Spire. I have a Gaia GPS track of it. Not sure what to do next. Thanks!