When I had kids I gave up motorcycle riding and rock climbing. I bought life insurance and both of those activities would have increased my premium. Surprising to me, kitesurfing was off the life insurance radar.
I think it is ok to put kiting on the back burner now that you are a parent. I wouldn't be surprised if there is an evolutionary change in brain chemistry when you become a nurturer. The first 10 years of a child's life are the most influential and go by fast. I would brainstorm and map out all of the things that you want to expose your child to in the next 10 years (like a parental bucket list) and try to map it out. Their interests will be constantly changing. Go with the flow, but try to expose them to things on your list as you go.
I agree with Peter_Frank on trying something new. It keeps the stoke alive, and many times is cross-sport relative in terms of muscle groups.
For my kiting career, I would always be trying new combinations of equipment. Early on, I tried flying all of the different types of kites that I could get my hands on. I even built a few of my own. Then I moved on to boards and tried all of the different designs I could get my hands on. I even built a few of my own (which I liked better than production).
For light/ultralight winds days, I got into flatwater SUP. Then I eventually tried it in the surf and it was one of the hardest sports I have ever tried. It lit a fire under my arse and I dedicated a year to get good. Now I find that I rarely visit my flatwater kiting spot, in favor of my local surf spot. With kites and SUP, I am covered for any condition, any day. Surf SUP eventually got me back into prone surfing, so I try to dedicate a day out of the week for prone paddling. If you try to surf SUP in 15-20k conditions, you will quickly miss flying a kite, as it is tough.
If you decide to get into a different sport, I would advise you to sell all of your current gear that you don't love, especially the gear that still has resale value. After a decade of child-rearing, you may see the light at the end of the tunnel getting smaller as to your own physical abilities as you age, increasing your desire to get sessions while you still can.
And remember alcohol is a depressant. Covid has been enough of a downer. If you can find positive influences in your life, follow that path.