I still read a local blogger, Wardrobe Oxygen. She's cusp (between regular and plus sizes) so it does'nt always work, and some of her outfits are crazy, but I get enough from it that it works. However, she quit her job to blog full time so I can already see she's getting less relevant for a professional style.
I've recently started reading
https://jolynneshane.com - she's 40s, but works from home and 90% of the time wears jeans. I had no idea there was so much to say about jeans. And sometimes she "styles" something differently by wearing flip flops instead of wedges. But I get some ideas for casual outfits from her.
It is really hard to find blogs for professional style for 40s women, I totally agree. The good ones quit their professional jobs and blog full time and wear work out clothes all day long now.