DNN 9.2.2 includes a new Export/Import Personal Bar extension that is used to export or import site contents.
The export result is placed in a folder in the installation's App_Data folder. The folder name is the date and time the export was taken.
If you can to import into a new DNN installation, move the folder to App_Data in the new installation. This can be a new installation on the current server, or a different one.
CAUTION: Do not rename the folder! If you do so, the import will not work in the new installation, and you will get a misleading notification about your Internet connection. It may be possible to fix this by also editing export.json in the folder (but I haven't tried it).
NOTE: Unlike previous versions of DNN, the Export/Import process uses a scheduled task. The default installation runs the Export/Import task once a day. So, you may want to change the Scheduled Task to operate more frequently (I used 15 minutes).