I think you underestimate how much work the Queen would have to have done to have the understanding of all the countries’ laws, customs and political situations when she would meet their presidents, prime ministers and ambassadors. And she was doing that sort of work into her 90s.
Every leader she met spoke very highly of her knowledge and dedication to detail. You wouldn’t get world leaders saying what they have about her this week if she was just someone who showed her face at public events to cut a ribbon (including from Putin). If she was just someone who did that, world leaders would react to her death like that Alan Aprtridge “so what” gif.
She was an important part of many countries gaining their independence during her reign. And then has been a huge figure of the Commonwealth and keeping the Commonwealth going. She got 46 countries to join the Commonwealth during her reign. What other person in history has seen an empire crumble, help in getting countries gain independence from that empire, and then work with nearly 50 independent countries and get them to voluntarily join the old leader of that empire in a multilateral union that benefits all involved in ways from lower trade prices to laws to abide by democracy and avoidance of human right abuses?
It’s daft when people say the Queen did fuck all.
I might work harder day-to-day in my life than she did, but I could live for 1,000 years and not achieve what she did through her work.