There’s not a definitive way to tell for sure but one way is to actually call her. If she hasn’t blocked you, the number will ring for a few times and go to voicemail. If she has blocked you, it will usually kick over to voicemail after just 1 ring. Keep in mind that doing this may prompt her to actually block you. Ghosting is a fairly regular occurrence in the bowl and it’s not all that uncommon for someone to re-appear after several weeks or even months of radio silence.

Since you often don't know  if the end of an arrangement is permanent or not, always keep the door open.  One fantastic young woman I dated heavily for a year ghosted on me.  I didn't blow up her phone with texts every day, and I found out online that she was working on her sobriety and not socializing.  Time passed, and every few months I'd send her a nice message, wishing her well.  Over 2 years (!!) after she ghosted she finally replied! We had a lovely long conversation over lunch, and just might get back together.  I've had this happen with several SB and have wound up back in bed with them. So it's worth putting a bit of energy in to keep those doors open.