As above, 32:18 will get you a similar gear to your old 32:16 on 35”, but that’s an MTB gear, not a town/gravel/adventure gear (at least by my definition; YMMV—and “adventure” in particular could mean all sorts of things).
My town bike and gravel bike are both somewhat higher geared; I think the former is 38×16 on 26” wheels and the latter is 46×17 on 700×37. (I might be out by a bit.)
One thing I did do for a while was run a dinglespeed: one ratio for off-road and the other for tarmac/gravel. The latter added two teeth to the chainring and lost two from the rear sprocket, so if you used 32:18 for one then it’d be 34:16 for the other (I forget which exact numbers I used, but I think I aimed for the low gear to be a bit over 50” and the high to be something like 65” or so). The only thing here is that I’ve only found that to work well with track ends. Any other frame type (EBB, sliding dropouts, tensioner) will be a faff at best. The slight change in effective chainstay length didn’t require adjustment of the brake callipers, but did warrant a few turns of the screw on the chain tug.