I never use the Cut page - for the reasons Peter mentions - but I had a quick look in the manual, and it appears that Cut combines audio and video together. From the manual:
Resolve v17 manual page 420 wrote:Tracks
The Timeline is divided into multiple tracks, with each track capable of holding a sequence of clips in order to create a program. The main tracks, which are labeled numerically, combine a clip’s video and audio into a single item in the Timeline, for simplicity. Editing the In or Out point of a clip edits the video and audio together.
Track 1 shows combined Video+Audio tracks in the Cut page Timeline.
TIP: In the Edit page, Video+Audio clips are presented as separated Video and Audio items on different tracks. When you open the Fairlight page, audio is presented on tracks with lanes, where each audio channel can be seen. In this way, each page gives you different sets of controls over the contents of the Timeline that are appropriate for each page.
So I think you'll only see a separate audio track on Cut when you add audio-only media. Whenever you add video with integrated audio, it'll appear only as a video track.