(I work at Stripe and, while I don’t do engineering interviews, have strong views on the topic, which may or may not be equivalent to our views. I believe the following is substantially accurate regarding factual representations.)

We don’t do whiteboard interviews for coding. If we have a coding interview, candidates can do it on their choice of their machine or a loaner machine from us with one of a few environments installed.

Most interview loops have approximately two 45 minute coding interviews. The other interviews might focus on (depending on job/seniority/etc) design, architecture, product sense, industry knowledge, communication style, etc. (Each interview tests one cluster of skills against a rubric, as explained in the linked article.)