There are various files you can check, though most of them aren't true MegaDrive VGMs.
Knuckles' Chaotix uses command 0x93 for re-synchronizing playback every 1 second. It's using the DAC commands with the 32x PWM though.
Most games on vgmrips
that use the DAC are probably using command 0x93 as well.
If you want a true YM2612 VGM, then you could also have a look at some VGMs I made from the music of the "Jester's Challenge" ROM hack.
Those were the VGMs that I made for testing the DAC stream code. (I coded them manually in a hex editor and there are even comments blocks with offset/length/time lists.)