This is a gray area. The font is proprietary software owned by Apple Inc. You are legally permitted to use the font on Apple hardware (Mac, iPhone, iPad). Distributing the raw .ttf file on third-party websites technically violates Apple’s EULA (End User License Agreement).
If you just want up-to-date emoji (including iOS 14 style, but legally usable): download font emoji ios 14 ttf
: Community-vetted threads often host Magisk Modules that contain the iOS 14.2/14.5 TTF for system-wide injection. This is a gray area