A Google search for "how to become a tech lead" reveals titles like:
Four Things I Wish I Knew When I Became a Tech Lead
5 Tips for Being an Effective Tech Lead
How to be a good technical lead
It's ended up being a lot harder than I expected to find anything about how people typically become tech leads in the first place.
Virtually all of the job descriptions I read request prior experience leading a team (often 3 - 5 years), so it seems to be very difficult to get hired into another organization to fill that role.
That being the case, how do people typically become a tech lead in the first place? What did they usually do to get the job in the first place? Are there general strategies people tended to follow or specific training, certifications, or skills people tended to acquire to help them "move up" faster?
Note: I'm not asking for personalized career advice (which I realize is excessively opinion-based and/or too localized for this site) - I'm asking how people become tech leads "in general."