look in C:\Users%username%\AppData\Local\
Microsoft\
Edge\User Data\Default\databases\chrome-extension_edacconmaakjimmfgnblocblbcdcpbko_0
you'll find a file just named a number (eg. 4, 10)
that's a SQLlite database. You can copy that file into your current database folder and the saved sessions should appear.
Otherwise, download a SQLlite database tool (I use DB Browser for SQLite) and you can grab the saved sessions.