Have you tried the "Fit In Window" button at the bottom of your 3D window?
Also try switching from Perspective to Axonometric.
Sometimes (especially in perspective) your 3D can be looking in a totally different direction and sometimes fit in window does nothing.
And open your Navigator Preview and you will see an arrow (target) and a circle (view from (camera) location) joined by a line.
You can adjust these to adjust the 3D view.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11