I find the contents of the Lighthouse Newsletter/Blog very insightful for leadership although it tends to be quite longer than I want. I highly recommend it!!! https://getlighthouse.com/blog/ Do you know any other good newsletters or blogs for leadership?
Just googled it. https://softwareleadweekly.com/ Software Lead Weekly by Oren Ellenbogen (This is the first newsletter I subscribed to in my career life. Oren has selected a great list of articles on engineering management every week. I especially love his "My humble effort to help you start the weekend with a smile on your face." section.) https://levelup.patkua.com/ Level Up by Patrick Kua (Patrick divided his newsletter into Leadership, Technology and Organizations and Process sections to make it easier for you to browse through the content. I also enjoyed a lot the little blurb he wrote on top of the newsletter every week.) https://newsletter.pragmaticengineer.com/ The Pragmatic Engineer by Gergely Orosz (Greg provided a lot of amazing insights about the industry you would not be able to find elsewhere. https://wherewithall.us2.list-manage.com/ Wherewithall by Lara Hogan (Lara's newsletter is particularly great for first-time managers. Go check out her website with some free templates as well!) https://www.scarletink.com/ Scarlet Ink by Dave Anderson (Dave shared a lot of interesting perspectives and leadership experiences from his background as an ex-Amazon GM and Tech Director.)
https://betterstack.com/community/blog/best-engineering-newsletters/
Not for leadership but https://tldr.tech/