Brightsky you are probably having a reaction to your recent 40th birthday. But, you surely know that there is so much more to life than having a child or children. Even for those of us that did this, it is only for a comparative short period of our lives. Most of our lives are living childless.
Yes, it is so difficult at present to actually meet people, although so many groups are meeting via zoom. Not long now, hopefully, until more groups will be having proper meetings, particularly those that can do so outdoors.
Do not dwell on thoughts of any sort of wasted past time, just remember how much time you have to look forward to. Forget about the idea of meeting up with any sort of life partner and concentrat on just getting to know people and, maybe, making new friends (of any gender).
So many charities want people of all sorts of skills, involving children, older people, sick people, and many such groups such as sports clubs etc. Find out now, whilst you have the time to do some checking, on what you think may interest you, ready to join as soon as permitted. Think about taking up some sort of learning activity - interesting, fun and will meet other people.
Having children should never be the be all of our lives. Look forward with glass half full attitude and I am sure that within a short time you will able to realise what an enjoyable and fulfilling life you have.