Decathlon do a couple of options, I’ve got their cheaper ones (just bigs gloves from a softshell type material) which are great for riding on the road, commuting etc.
And their proper winter gloves with the zipped vents on the back, great for keeping your hands warm at hip-flask / cake stops.
One VERY important thing to note is if you have cold hands and feet it’s NOT usually your gloves/shoes fault, it’s your body’s response to the cold bringing your core/blood temperature down. So think more about the rest of your layers, like polypropylene base layers to keep your torso, arms, and legs warm, a skullcap of some sort, buff/scarf. If your body has warm blood to pump around (which it should whilst exercising) then it can afford to keep your extremities warm, if you let your arms/legs/head get cold then it will shut off the supply of warm blood to your hands/feet and no amount of insulation will keep them warm if they’re not being warmed in the first place.
Case in point, I sail most of the year in fingerless gloves, but my hands stay warm because I’m wearing a PP baselayer under a 3/5mm wetsuit with a windproof layer on top and a balaclava and don’t suffer with cold hands until the air temp drops down to around freezing despite being far colder/wetter/windchilier.