TLDR: it is straightforward if you consider that not having the ratios that you currently have on the largest chairing is fine. If you like to keep the ratios that you have on the largest chainring, it's doable with some cranksets with removable chainrings.
It's something I keep investing but there no simple answer yet. Trekking components are "based" on MTB standards, but have diverged recently. MTB have been going to single chainrings and large cassettes, trekking remain almost unchanged. Also, the use of cassettes with 10T sprockets has allowed to shrink the chainring size. Trekking groupsets have ratios that are closer to gravel bikes, but gravel groupsets are not usable on trekking bikes, because bottom brackets have different widths.
If you prefer to keep your current wheels (if you still have the stock wheels, it's very unlikely that you can just swap the freehub body, so you'll need a new freehub, replacing the whole wheel makes more economical sense that just replacing the hub) and still have high ratios, you will basically need a 40T or 42T chainring (the ratio will still be lower than what you have now, but that's not a bad thing). But on MTBs, mainstream brands are selling 36T at most (sometimes 38T, but you'll find them in catalogs but not in stores).
I haven't found at this stage a modern crankset with a 40T-42T that would work with a 73mm bottom bracket. Even exotic cranks like garbaruk are not selling chainrings that would fit on MTB cranksets with more than 38T. But if you bike has removable chainrings, you can probably order a compatible chainring at garbaruk. Make also sure that you can fit a larger chainring at the position of the middle one.
That being said, what I wrote is valid only if you want to keep "gravel ratios". If you are OK with the compromise of having smaller ratios, the most straightforward option is a 36T MTB cranksets, then standard MTB derailleur at the rear, but with a cassette that has a 11T smaller sprocket. If you enjoy riding without the large chainring, that will work.
Recommendation are usually not appreciated, because they are only valid at one point in time. In "deore price points", SRAM seems to have a bad reputation (no personal experience). A Deore M5100 (11-speed) would be highly recommendable. Or a M6100 with a non Shimano cassette (because of the 11T sprocket).
Note that 73mm bottom brackets are arriving on gravel bikes. But now, it's still problematic: only SRAM does it, but compatibility is an issue.
