@M1ndB1ast Are you saying you uploaded these from your computer instead of directly from the site? If you copied the URL, it should still be on the upload page.
In any case, you still need to provide the source. If you don't remember where you got it from, you can use SauceNAO to find it. SauceNAO also provides convenient links to other image search engines. Using Google, I was able to trace the first and third images to this tweet:
https://x.com/donki_donki/status/1942418972873482369
You can try it yourself for the second image. Just keep in mind that the files can't just look the same; they have to actually be the same file. I would download a free hex editor like HxD and use it to compare both images. You can also use the tool at https://duplicatebooru.zipfiled.info, but it will only tell you if the pixels are the same, not whether they're a byte-for-byte match. But if the pixels don't match, then that saves you the trouble of having to check with the hex editor.
Also, when checking Twitter images, make sure you download it when the URL has the "orig" suffix so it's at full resolution.