Spoiler images uploaded from gallery on mobile

I've noticed this last year that there isn't any way to spoiler images easily when uploaded from the gallery on mobile. Compared to uploading on PC where there is a checkbox that you can click to spoiler an image, that doesn't exist at all on the mobile app.

It looks like the only "acceptable" workaround is to send a message to a private channel, reshare the image, and copy the link and use the spoiler tags on the link OR to go into the file system to edit the name of the file to include SPOILER_ in front of the file name. Both of these workarounds are inefficient compared to just being able to being able to have a button to click when sharing from saved photos. Editing the name of the photo is difficult on mobile and no one wants to have a channel full of random pictures they were trying to send just for the links so that they can spoiler the images. Hopefully this is a feature that is easy to add, but regardless it will save a lot of headache and frustration for any mobile user. (I'm unsure if this is fixed on iPhone, but I know for a fact that this functionality is not in the android version of the app).