They are often not required. It's obviously great if you have worked with a lot of the technology used at the new company, but many companies don't apply these as hard filters. I've never seen a candidate that had a 100% technology fit, but not one cares about that.
I view the technologies listed in the job ad much more as information for the applicant to judge if they'd be comfortable working with such a tech stack. Often it's the only place to get a glimpse of what technology a company is using.
I write monoliths and I have only experimental experience with cloud, microservice, k8s, lambdas (no-sql is a no brainer). I can not find a job. All the recruiters offering any Go job, demand knowledge of exactly that. But since I'm a single guy with a currently non-existant budget I chose the cheapest way, monolith with a single database on a single server.
How am I supposed to acquire those skills? I don't have the time, motivation or the money to throw at expensive cloud or write overly complicated microservices with events. I need to get things done, not play with tech that my clueless employer wants, because they watched so Kelsey Hightower video.