Title block, blocks viewport after import, can't send to back

My title block in layout won’t stop blocking my viewport when I import a scene. Every time I import a scene I can’t see it unless it’s imported on the side of the drawing sheet, then disappears behind the sheet once I try to move it in. What’s going on?

That would imply that you are putting the viewport on a layer lower in the list than the title block is on. Move it to a layer higher in the Layers list. Here’s an example of layers from one of my templates. Note the title block related layers are at the bottom. Layers for viewports are above them.
Screenshot - 7_6_2021 , 9_09_31 PM

Send to front, send to back, etc. only have and effect on entities on the same layer.