Is there a way to show audio waveforms in a muticam sequence?

Not sure if this will help but have you tried rendering the audio?

Its a bit tricky:

In your multicam sequence (i mean the source file) every audio track has to go out to a seperate output. That means, if you have 8 audio tracks you have to route them to 8 separate channels in the output. Each group 1/2, 3/4 aso has to be panned to L/R. The very moment only one of these channels is mixed up with another channel - for example since one channel is not panned 100% to the left but only 99% - your waveforms in the sequence you are editing the multicam file in will vanish.

You also have to look for the audio channel settings of the MC-Clip. Here the outputs may not be mixed up as well.

If you have very many audio tracks in your MC-file (i sometimes have 9 cameras with up to 8 audio tracks each) you can mute unwanted tracks in the MC-File like i did with channels 5 to 8 in the screenshot. Then you don't have to route them to maybe output 64 or so. Or you can simply remove these tracks from you MC-source if you are sure that you will not need them.

If you work like that, the MC-Clip simply hands the waveforms of the original audio through to your sequence.

If tracks get mixed in the MC-file the waveform would have to represent kind of a sum with no physical equivalent on your drives. And that is maybe too much to ask for, i guess.