I was looking at bathroom grab bars and saw these
WINGITS | Products
'Rated up to 600 lbs. in drywall and tile'
...umm...maybe.
That will need more than those dinky 1/4" screws. Go 1/2" or more at least.
And a lot more penetration into studs if possible.
Or invisible hangers from behind.
Hollow it out to drop weight.
Plug holes flush and brush paint it grey to match.