If you've connected your personal laptop to your work wifi, they 100% can see all your browsing history (specifically whats passed through their network).
Hell, I only run a simple homelab and I can see the exact traffic/browsing history of every device on my home network. I'm only tracking via dns traffic, but your https traffic can even be intercepted and decrypted pretty easily. So don't even trust that.
This doesn't require installing anything on your device to fully monitor you.