You can post the 360 images to Facebook, Google Photos (it can automatically sync with your mobile phone), or a number of other photo galleries.
If you want to use a section of the picture for a 2D “flat” image, you will lose resolution compared to a DLSR. You will get better 2D “flat” images with a mobile phone.
However, if you want a wide angle or have the 360 images already, you can get usable images by cropping out a section of the 360 image manually with a screen grab. This quality is probably not sufficient for the final real estate site.
You can also experiment with this plug-in and see if it meets your needs.
Let us know if you want the 360 view or the “flat” view and if you’re looking for “good” quality shots for a real estate site or just something quick to share on social media.