There are still peole like this who think Software Engineering is Computer Sience

it's barely even engineering

I would say in well known tech companies it's the opposite: software and system engineering > computer science > web development

Typically softeng roles require a degree in CS or equivalent, and many years of experience on top of that.

Then again, in some other companies "senior engineer" is somebody who did a 3-months bootcamp and 3 years of work. It's very unfortunate.

is that because "computer science" is understood to be algorithms? That's like a super narrow area in it

I've encountered some "computer science" programs that barely taught people to program in Java, included classes on Microsoft Excel and Access and didn't include any advanced math. Data structures and algorithms might get a single class to satisfy interview questions about linked lists vs arrays and what Big O notation means. It's kind of a polluted term I think, in part due to that kind of usage by community colleges and the like.