Drawing Enlargement

Any other feedbacks are appreciated.

You want to resample an image (no matter whether up- or downsampling) and the image’s pixels have to be changed.

You can get different results with the different Methods (also try »Preserve Detail«).

Additionally you can convert the Layer/s to a Smart Object before rescaling to save the unedited content within the file, but that won’t allow for »Preserve Detail«.

Just to set your expectation, if you need to increase raster artwork significantly, you won't get great results. But here's what you could try.

You might make a copy of your document, so any changes you make won't affect the original. Then go to Image > Image Size. Make sure Resample is selected and look at the drop-down menu next to that. You can use Automatic or try the two settings for enlargement. Change the canvas size to what you want.

Otherwise, you could try placing your artwork into Illustrator, tracing it, and increasing the size as a vector graphic. Tracing has its limitations, too. You'd need to test various settings and even then, depending on your artwork, the Illustrator tracing might not be acceptable. You might have to do quite a bit of clean up with the shapes.