Originally Posted by rivers

Neither of those will be an issue with bikepacking bags. My road bike has 36cm handlebars and gravel bike 40cm. I can easily fit a camera, wahoo, and light + handlebar bag on both. If you're worried, get a handlebar extension thing for either the bar bag or your gadgets.
A saddlebag will have mounting points for the varia. You may just need to buy the appropriate saddlebag mount for the varia itself.