Based on the filename download-sci-flyr-v1-univ-64bit-os140-ok14-user-hidden-bfi2-ipa , New Release: Sci-Flyr v1 (Universal 64-bit) iOS 14.0+ | Build: OK14 | File Type: .IPA
Since this is an IPA file, it’s always a good idea to include a VirusTotal scan link or a MD5/SHA256 checksum so your users know the file hasn't been tampered with.
Full compatibility with OS 14.0 (Build OK14).
Use a trusted sideloading tool to sign and install the app to your device.
(Mirror links available in the comments) A few quick tips for your post: