I can't download the image
you can save the image, despite the absence of an option or button with 'download' on it.
Having viewed the profile of the person from the search click on the headstone thumbnail photo and a new window opens. Right click on it & 'save image as'. Open & increase magnification/zoom if necessary with any photo viewer.
I'm using Firefox but will be a similar option in Chrome etc.
You could be waiting months/years for a photo on Findagrave and if someone uploads they do not necessarily transcribe themselves, others frequently do that from the uploaded photo - is a collective effort by those registered.
The reason it is likely not photographed or transcribed is because someone has pulled the data in from elsewhere - that is why all the Belfast City and Roselawn names are indexed on Findagrave, someone imported from Belfast Burials, is a number competition for some. The 'Creator' or 'Manager' of the entry is not necessarilly local, could be in USA or Australia and they need to approve any suggested edits.
Check Billiongraves too
https://billiongraves.com/cemetery/Blaris-Old-Cemetery/269947 but you only get a low resolution image there unless pay.