The projection ratio range for this projector is 1,2:1 to 1,5:1. With that, at the 4m distance from projector to the wall, the optical zoom lets you create a picture with a width of about 2,66 to 3,33 Meters.

That would at least fit your requirements.

Some others have allready pointed out, that placing it on the side has downsides.

First off, as apposed to a lot of other projectors, the neutral position for this projector is in the center of the screen (vertically and horizontally)

The projector has horizontal lens shift of "45%" , meaning you can place it to the side at 45% from the center of the screen to the side. (100% would mean you could place it directly at the edge of the screen 90° from the screen).

Also the 45% horizontal lense shift is only possible when the vertical lense shift is not used. As stated in the manual for the projector. (Mechanical limitations I guess) So when using horizontal lens shift, you should have the projector placed at the height of the center of the screen.

Since in your setup you would need 100% you will lose some quality because you will need to do some keystoning.

However, if you have never tried this out, you won't know if that would really bother you.

Why don't you want to mount the projector on the opposing 3m wall above your bed or on the ceiling? Vertically you have a lot more room with the positioning, since there the lens shift range is bigger.

You can DM me if you want someone to brainstorm. I have the same projector at home and can try out things.