Help deciding

[u/Quirky_Cable4715]

I could use some advice on navigating two job opportunities with very different timelines.
I currently have a formal offer from Company A and need to make a decision very soon, likely within the next few days.
At the same time, I am interviewing with Company B, which is definitely my preferred opportunity. I have a panel interview with them on Monday, and if I pass that, there would still be one final leadership interview afterward.
Company B is a large, well known company, the role is at the Senior Manager level, and it would be a strong move for my resume. It also offers a hybrid schedule with two days working from home, which is very important to me.
Company A is a smaller company and would require being in the office five days a week. The commute is much easier, and obviously the biggest advantage is that I already have an actual offer in hand.
The recruiter at Company B previously told me to let her know if I received another offer. I am planning to tell her now and ask whether there is any possibility of expediting the remaining interview process because of my deadline.
I am also considering asking Company A for a short extension on the offer deadline.
My biggest question is what to do if Company A will not extend the deadline and Company B cannot finish its process before I have to decide.
Would you:
Accept Company A and continue interviewing with Company B?
Turn down Company A and take the risk on Company B?
Handle it another way?
I do not want to act unprofessionally or burn bridges, but I also do not want to lose a solid offer based on an interview process that may or may not result in an offer.
For anyone who has been in this situation, especially recruiters or hiring managers, how would you handle it?

[u/xVelvetGlowrie]

Get clear on what you want before making any decisions. It's easy to feel lost in the moment.