I suggest two ways to learn what tech developers are using right now: ask a friend or check out the most recent Stack Overflow Survey like this one from 2022.
Asking a friend is usually best, using open-ended questions starting with who, what, and how to elicit better conversation.
First, a friend will be able to give you more context about their project's who. Who are their customers? Success is impossible without knowing a project's customers. Knowing about your friend's customers will help you understand everything else their project. Do not skip this part of the conversation, as tempting as that may be.
Second, a friend can tell you about their project's what. What need of your friend's customers is your friend solving? Knowing what your friend's customers' need will help you understand where and how software can help them.
Finally, your friend should be able to explain their project's how. What tools, techniques, and technologies are they using to help their specific customer solve their specific challenge? Here, with all the context in place, engineering skill enters the scene.
A lot of people start by talking only about the how, with questions like what programming languages do you use? What platform are you programming on? What is your favorite integrated development environment (IDE)? This is a mistake.
As interesting as how questions can be, they are hollow without a knowing the who and the what. The who and the what are most meaningful. They explain whom we are helping, with some problem that they have. Start there with your questions, they will help you become a developer with superior empathy, responsiveness, motivation, and skill.
Not only that, but a friend might also be willing to listen to you about your projects. Walk them through your who and what, ask them how they would deliver the project, and enjoy the conversation. They will not only be helping you gain insight into your own customers and project, but you will be helping them expand their knowledge as a professional.
That said - if you really are only interested in the how - I cannot recommend enough Stack Overflow's annual developer survey as a place to start. Every year, the organization polls tens of thousands of developers on various aspects of their career. While these or any survey results will lack the depth and focus of a conversation with a developer friend, they may spark new ideas and offer insights into new areas of the industry.