I'm not sure it's an introvert thing... I've no desire or need to go to the office, I have many friends not at work and have no need for the false "socialising" you get in the office environment
But some people demonstrated they could achieve that without physically meeting over Covid... mandating it as a "sheep dipping" approach is old fashioned and thoughtless.
For me I don't need it, and I've proven that again working for a Belgium team from London. To tell me I need it to build rapport is ridiculous and a waste of my time and money.