Post Downloaded Photos to Twitter

I am only given the option of posting photo that my iPad has classified as photos and photos that I have downloaded from the internet (of my own) are not among them. I can’t browse to the downloads folder from the Twitter append image dialogue.

I have given Twitter app permission to access all photos. This relates to

How to change privacy settings on twitter… - Apple Community

I was not given any options as to where to download the photo to at the time of downloading. This relates to

Photo does not appear in Photos - Apple Community

BTW I wish old threads were not closed, are regarded as repositories of information rather than “conversations.” Microsoft forums have a similarly policy where it was claimed that leaving old threads open increases spam. That seems to me to be unlikely.