How to sync remote pc folder without client agent app

Is there a way to sync files between a pc via a “pull”. In other words is there a client-less way to get files onto Nextcloud server? I have 2 networks and the Nextcloud server’s network can talk to the client PCs network 1-way, in other words the client can’t push files to the server

Not sure if I understand you correctly.

You can use any WebDAV client to connect to the server.
A server is usually not contacting clients.

Ok thanks. WebDAV still requires that client network can communicate with servers but my firewall prevents that. Sounds like there’s not a way for the server to connect to client folders and pull files.