What could this scab-like patch be on our cat's nose?

by Lisa
(Ontario, Canada)

We just adopted our sweet cat a few weeks ago. When we met her, she had a dry raised patch on her nose that looked almost like an old scab or scar.

The employee at the SPCA said that she had never noticed but it was likely from rubbing on the cage or carrier. After looking back at photos, we have realized how much more profound it looks now (gradually over the past few weeks so we couldn't tell until comparing photos!)

It doesn't seem to bother her but she has been more reclusive and sometimes sounds a bit congested in her nose. We have a vet appointment in a few weeks, but I am worried if it is serious we should not wait that long. Any insight would be greatly appreciated!