Yeah, the "Parts" section of the kanji page is blank. You can see how to submit kanji information to the appropriate resource in the FAQ.
Though, I'm not 100% sure how the parts are determined anyway (since some are certainly non-standard representations of kanji parts). Either way, I don't think it's handled directly on Jisho, same as most information in entries.
Are you talking about the radical search? The search results don't show every kanji. See: https://jisho.org/forum/613ce40ad5dda71e3b000000-why-cant-i-find-these
氳 certainly has parts available but as it's a supplementary kanji perhaps Kimtaro is not using them in Jisho. You can find the kanji using the page at https://www.edrdg.org/cgi-bin/wwwjdic/wwwjdic?1R
- select the 气 and 皿 radicals
- enable the JIS0212 option (supplementary kanji)
- Click on "Find".
About 13,000 kanji have their radicals indexed there.
@JimBreen I don't use the radkfile2 in Jisho. I don't remember exactly why anymore, but I think it had something to do with the license at the time. Maybe I should take another look at it.
Kanji 氳 not showing up in the search bar despite being listed on jisho.org
When looking up kanji by radical, the kanji 氳 (https://jisho.org/search/%E6%B0%B3%20%23kanji) doesn't show up when clicking on the "气" radical despite being listed on the website. I haven't checked but maybe this applies to other kanji too ?