Closest I get is currently is Trusted Credentials. Maybe it will be there on my Pixel 8...
You have to search for "Smart" and it's way down at the bottom of the results, under "Security", accordingly.
Or, it's under Settings -> Security -> More Security Settings -> Smart Lock.
It's been pretty reliable for me for quite awhile now. There was a period where I had to sort of reset a single device The device would be connected, but failing to keep the (un)lock functional. By going into the Trusted Devices in the above, and clicking on the device, it would start functioning as expected. It's been some months since this part got fixed...