Fuji could do what Olympus does: ie The box says 25mm and prints the 35 equivalent on the box (50mm).
This is nothing new. If you shot multi format in the film days you had the same issue.
A focal length in on format has an equivalent angle of view in another format
50mm in 35mm and 80mm in 2 ¼ have a close to equivalent angle of view. (didn't call an 80 a 50 or 50 an 80)
You think in that format, when I shot 2 ¼ I didnt think in terms of 35mm. If I wanted a wide angle I would get a 65mm lens or wider
Back in the days before digital and the ineternet - Calumet in the front page of there mail order catalog
had a table of equivilnet focal lenfghs and angles of view. -- 35mmm, 2 ¼, 4x5, 8x10, ( mostly for interchangeable lens cameras)
I remember having to figure out what was a "normal" lens when I bought a 4x5.
The problem more complex with digital because there are more sensor sizes.
Film had a standard set of format sizes so all manufacturers could make standardized film.
Digital doesn't require a standardized sensor, (memory cards are the film (standardized)--- that's a different paradigm)
Compairing to 35mm film is probaly there for historical raesons. tons of 35mm film cameras were sold. A lot of people think that way
Larger formats were use mostly by professionals, advanced amateurs or photo students
In the other direction --Point and shoots ( 110. 126 film etc). People never had a concern for focal length.
Todays comparison -- How may poeople even consider the focal lenghth/ angle of view when they buy a phone with a camera.