Few different posts in here https://www.bladeforums.com/threads/inserting-pics-from-phone-to-bladeforums.1519291/
Essentially you goto an image hosting site or app and upload your photo to it. Then take the link and paste the link here. If you can find a direct link to the image ending in. .jpg or. .png or whatever it is, then you can embed it using the image icon on the forum toolbar.
Imgur.com
Postimg.org
Are just two I use randomly.
I'll try imgur app I tried 2 with zero luck I may just be an apptard tho