Can you search Filenames in Spotlight as opposed to all metadata and contents by default?
Apple has search keys, so it's not changing a default, but it does let you specify file names (here they would contain the string "test"):

name:test



https://support.apple.com/en-us/HT204014
Can I use Spotlight to search for files by name?
https://apple.stackexchange.com/a/12056/5472 has a picture of entering this quite a few versions back - so here's a newer screen image of this in practice.