FB is among the last places I'd look, and would not be impressed by that being the only web presence for a small business. Seriously, seeing such induces an involuntary "ugh".

Putting up a website is trivial & cheap, and looks a whole lot more professional than one on FB. As a customer, I'd look for it by a Google search, and go to the "official" site. Put the hours there, and an easy link to a popular mapping site.

Frankly, having followed social media since dialup BBS days, I find Facebook a surprisingly crufty/poorly-made site. A core design has been hacked up to wedge in whatever new features. A new site could easily provide a next-gen UI, better putting common content together, better assembling a feed, saner advertising, and pointedly avoiding "censorship" ... only thing needed is that "tipping point" for migration.