Does my MacBook - which is connected via Thunderbolt bridge to an iMac with Internet Sharing - see devices on the network the iMac is connected to?

I can see a new subnet is created on the Thunderbolt bridge adapter: 192.168.2.x

My main network is 192.168.1.x - the iMac is connected to this on Ethernet adapter.

Can I let the MacBook connect to other devices on the 192.168.1.x subnet? I want to connect to a network share on another device in this upstream network.

Ideally:

• I would be able to assign the MacBook with an (additional?) IP address in the 192.168.1.x range.
• Bonjour would be able to find devices on the upstream network that had file sharing enabled, and show them in the Finder sidebar.