Correction in the resolution of image files (Patreon)

I just found out from a patreon that the images I've been uploading through the patreon app have been getting compressed and downscaled. Excuse me guys, I thought it would be a good idea to use the patreon application but it seems that it only uploads images at 1200px when the ideal is 3000px. I will upload the image files again but this time from the browser, sorry again T.T Tomorrow all the images should be in higher resolution.