Men also used to wear really nice suit and tie on a daily basis to work. Now most people go to work in t-shirt and jeans. I’ve seen companies where the janitors are better dressed than the CEO.
I would worry less about what women are wear, fashion is a trend that is constantly changing, and focus on a women’s morals, and values. There are still plenty of traditional women out there.
But you won’t find them at a bar in a big city. Churches are a great place to look and small town USA is where they live in large numbers.
Lastly the dating scene past age 30 has, and always will be a disaster, it doesn’t matter if it’s 2021, 1921, or 2121. The picking gets slim after 30 and by 40 it’s the absolute bottom of the barrel and rejects. On a rare occasion a quality catch will get thrust back onto the market (maybe their spouse cheats so they get divorced or a spouses passes away) but those folks get snatched up quick. You won’t find them at bars at 2:00am, and most don’t even bother making dating profiles online as they can’t find potential mates within their own social circles.