It's all interview practice.
IME, tech interviews vary wildly. My last one was mostly, "name two filesystems used on Solaris," so I felt mildly miffed about the time I'd spent on warming up my rusty Solaris skills.
One of the best was where I had to install Apache then answer the questions once they were accessible through the browser. I've had people just ask technical questions, I've had technical questions on paper, and technical questions on screen.
Obviously your questions will be slightly different (I'm a sys admin,) but how they present them and how in-depth they how will be very dependent on the interviewer/employer.
I went for a Windows admin job last year - my background is clearly all unix/Linux, but I figured I could learn it, and I'd been out of work for over a year so was starting to get desperate. They interviewed me. I didn't get it, but I clearly impressed them enough that they called me back for a very similar role in Unix. Didn't get that either, but I am now working for a different company that actually works with that team as an external supplier, but for about £20K more, so it's all good. But I think that interview practice and their feedback helped.
I'd go for it. It's all interview practice. There is the thing about men go for jobs when they match far fewer of the requirements than women (this is countered by women still needing to prove themselves in a way men don't in the tech world, though.) The tech questions may not be that challenging in the end. The only thing you guarantee is that by not going for it, you definitely won't get it.
I've had some good recruitment consultants in my time, and also some terrible ones. Some years back, I went for a job where the recruitment consultant had "restructured" my CV. "Your CV says you have experience of this product," said the interviewer. "Can you explain how to..."
"No it doesn't," I said. "I've never used that." I had used related products, and I could have probably blagged my way through if I'd cared, but I'd already decided I wouldn't take the job if offered. I hope thst recruiter got a bollocking off the employer (it was apparently a key requirement of the job,) as they also did from me. Although, it is also possible they just weren't that familiar with the technology, and didn't realise Company's Product X wasn't the same as Company's Product Y. But he could have asked. So nothing recruitment guys do would surprise me.