Every single job app I filled out in the last two years asked for my linkedin url. I don't know if not having one was disqualifying, but it does worry me.
I don't like it. I mean, I hate it. But when you receive 1000 resumes per day for a job posting, agressive filtering is the only way forward. My days don't have a 1000 hours.
Combine this with so many people who fabricate a fake resume with AI to sound like a perfect match to the job description. I need to review it against a linkedin job history to see if the story is consistent. Hard to believe the number of people who have their linkedin job history say one thing and their resume is completely different. This means I must be very suspicious of people who don't have a linkedin history, because it means the resume may be completely fake. So it goes to the reject pile. It's not fair, but I have 999 resumes to review after this one.
To summarize, if you are famous from conference talks, published papers or such, you don't need linkedin. If you are a regular non-famous person, you do need it.
Like a fico score, you can't escape the game if you want to play.