Are you able to Pick a File from the Import Window under "Select a source" >> "Other Source"
You can navigate to the folder on your network using the Explorer/Finder and Try to import few Pics
I’m able to pick an entire folder, it loads, but when I re-sign in, all the network photos are gone
Need more details here.
"Re-sign in" to what?
"photos are gone" from where? No longer on the network? Missing from the LR catalog? Referenced by the catalog but not displayed?
Mac or Windows? What version?
What exact version of Lightroom are you using?
Adobe seems to strongly discourage, but not quite eliminate, using a Network storage device as one of the sources for the library. (These days, this seems to be a severe, and anachronistic, constraint.)
As far as I know, Adobe has never stated, and never discouraged, storing your photos on a network drive. (The catalog file cannot be on a network drive, but the photos are fine on a network drive).
If the photos are on the Network drive, you want to import the photos using the ADD option, and the photos will remain on your network drive.