It is undoubtedly more acceptable to be overweight now than it was in times past.
As such a high percentage of people are overweight it is obviously going to be seen as 'normal' and reflected in the clothing industry's vanity sizing and so on.
Fashions for (female) attractiveness change and the current aesthetic generally favours larger proportions than in previous decades.
However, in terms of covid, as I understand it, being merely overweight is not a significant risk factor, so all of the above is somewhat irrelevant.
It is obesity that carries the real health risk for covid and obesity has not become socially acceptable.
Yes, a small and vocal movement are trying to make it so, but if the experience of obese people is anything to go by, it hasn't really caught on in the mainstream.
The vast majority of obese people would prefer not to be for health and social reasons.
They are not obese because society is either encouraging it or tolerating it, and to suggest this distracts from the real underlying issues.
I'm not sure what proportion of overweight people go on to become obese. Many overweight people do not keep getting heavier until they become obese. They maintain their weight, and in many cases would be able to achieve theirccorrect BMI in a relatively short space of time, which is
not so for people who are obese.
So, is it socially acceptable to be overweight? Yes.
Can you be healthy and overweight? Yes. Maybe not in optimum health, but probably good enough in the context we are speaking of.
However this is not the same for obesity.