When synchronising large amounts of audio and video, working solely from the timeline or creating merged clips one-by-one is messy and tedious. Ideally, it should be possible to automatically synchronise media from a bin or the project panel, so a pile of separate audio and video becomes a neat list of synchronised merged clips.

Avid has this sorted with their AutoSync feature, which has existed for years. (https://www.youtube.com/watch?v=T4frJqkc5EI) This feature looks and works much like Premiere's existing 'Synchronise' option, except that rather than synchronising media on a timeline, it acts on media selected in a bin, and creates synchronised subclips from that media.

Premiere almost has this feature. Selecting a number of audio and media files in a bin, right clicking and selecting 'Create Multi-Camera Source Sequence' does allow the user to turn a bunch of audio and video files into nicely organised and synchronised media - even moving the original media to a 'Processed Clips' bin to keep the project tidy, but the resulting clips are obviously multicam sequences rather than merged clips.

Many editors choose to then edit with these multicam sequences, though this is less than ideal, and requires work to clean up before delivery (https://blog.frame.io/2018/05/14/premiere-batch-syncing/)

If I want to create merged clips from these sequences, I have to drag them into a new sequence, flatten the multicam sequences, and then go through one-by-one and create merged clips. This is only marginally faster than creating merged clips one-by-one in the project panel, but at least I don't have to figure out which audio file goes with which video file by hand.

Ideally, Premiere would offer an option that works exactly like 'Create Multi-Camera Source Sequences', except that the resulting media is merged clips rather than multicam sequences.