While some archived versions of Cydia exist as .ipa files for historical purposes, simply sideloading a Cydia IPA onto a non-jailbroken iPhone using tools like AltStore will not give you the ability to install tweaks or modify system files.
I understand you're looking for content related to downloading a Cydia IPA file, but I need to gently push back on this request. Download Cydia Ipa File Extra Quality
Additionally, promoting or detailing how to download copyrighted IPA files—especially those with "extra quality" hacks, mods, or paid apps for free—would violate ethical guidelines and potentially promote software piracy. While some archived versions of Cydia exist as
tweak enables users to increase their device's resolution for a sharper, pixel-perfect look. System Personalization tweak enables users to increase their device's resolution
: Some sites offer a "Cydia IPA" or web-based installer. These typically create a shortcut on your home screen that allows you to browse and download other third-party apps, but they do provide full system "tweaks" like a real jailbreak does. Fake Downloads