Hi serenityprim3
I understand ifixit might not have a guide on some devices but you can try to google more or find some youtube videos on it. Hopefully you are able to find the instructions, but IMO more or less the disassembly should be around there.
You can try following the ifixit guide to disassemble your phone and while doing this, also take note and replace the defective audio jack.
What I can suggest you, is to order the audio jack parts from ebay or aliexpress.
You can try following the ifixit guide to disassemble your phone and while doing this, also take note and replace the defective audio jack.
I would suggest you remove the defective parts first and compare with the seller pictures, which i did it for other devices before committing to purchase the replacement parts.
e.g.
https://www.ebay.com/itm/Headphone-Earphone-Audio-Jack-Flex-Cable-For-Sony-Xperia-Z2-L50W-D6502-D6503/151893263919?hash=item235d8b462f:g:l40AAOSwv-NWUy7U
https://www.aliexpress.com/item/T-Parts-Flex-Cable-For-Sony-Xperia-Z2-AUDIO-JACK-FLEX-Cable-Replacement-Parts/32827695015.html?spm=2114.search0104.3.26.62454b18zQpfuD&ws_ab_test=searchweb0_0,searchweb201602_5_10152_10151_10065_10068_10344_10342_10343_10340_10341_10698_10696_10084_10083_10618_10307_10059_308_100031_10103_10624_10623_10622_10621_10620,searchweb201603_36,ppcSwitch_5&algo_expid=27709236-b1c6-452c-b0fe-ace26d64bde4-4&algo_pvid=27709236-b1c6-452c-b0fe-ace26d64bde4&priceBeautifyAB=0