I’m guessing he sees all you do now that he’s working from home & is feeling guilty he doesn’t help. So what he does is pick at you over something insignificant to make himself feel better.
Tell him the kids are getting older and you want his help to develop a “chore chart” for the family. Once you write out everything that has to be done, let everyone choose which chores they want to be responsible for. Everyone starts with at least five, with older kids getting more complex ones. Not only will it make hubs and the kids feel like they are contributing to the household and being helpful and responsible, it will be a visual reminder of everything you do for them. Chores can be changed/traded at family meetings once a month on request.
Everyone should be responsible for putting away their own dishes (at least in the sink if not dishwasher), their own clean clothes and possessions, and putting their dirty clothes in their hampers.
Younger kids can wash or rinse unbreakable tableware and/or put it in and take it out of the dishwasher, toss clothes in the washer and dryer or to hang on a drying rack, dust anything within reach, set the table, use a hand broom and dustpan, use a child-sized mop and broom, maybe spray & scrub the bathtub, wipe down lower cabinets, clean the outside of the toilet, feed a pet. You will have to supervise the kids for a while & offer to show hubs how you do things to start him off. Then don’t complain if he does things differently as long as they’re done OK.
Develop a reward system for either individual (all chores done that week) or family (everyone’s chores done that week)—or both—with individual and group rewards. Getting to chose the dinner menu, 15 minute later bed time, chance to call a friend or grandparent, a choice of family movie, something from the dollar store—even money—whatever you can manage that they’d enjoy. Don’t reward with food or special time with parents. The former can create an unhealthy relationship with food, and kids should not have to earn the latter—you should be giving them attention without having to ask.
Family rewards could be outings, a new game everyone can play, a restaurant meal, a half hour of telling each other jokes (give everyone time to prepare, maybe checking out joke books from the library. Build a pillow fort, snowman, puzzle, LEGO construction together. Or lie with everyone’s heads on someone’s stomach and fake laugh. Soon you will all be laughing for real.