New member here!

My previous 2014 Trek DS8.3 had a 48/38/28 8 speed. I recently moved up to a 2019 Trek DS4 which has a 42/28 10 speed and I really miss the high end. Most of my biking is road biking but with a lot of rough pavement, cobblestone, and some gravel. I'm really wanting to move back to a 3 ring 48/38/28 with the 10 speed . Unfortunately, while I've done plenty of basic bike mechanics over the years, I've never upgraded like this before and I'm not sure what all else is involved - do I need new shifters, derailleur, chain, anything else?

If it helps, my pertinent parts from the spec sheet are:

• Shifters - Shimano Deore M6000, 10 speed
• Front derailleur - Shimano Deore
• Rear derailleur - Shimano Deore M6000, Shadow Plus
• Crank - SRAM S1000, 42/28
• Bottom bracket - Sealed cartridge
• Cassette - SunRace, 11-40, 10 speed

Appreciate any and all input!