This addon adds up to 100 new ores, biomes, weapons, food, and 300 new mobs. All these biomes can be randomly found around your survival world and add 400 new blocks in total.
Select version for changelog:
Changelog
+ Added more model variations
+ Each food item gives a random effect
+ Mobs can be passive/ranged instead of just melee
+ Balancing and bug fixes
I found them on the latest Wayback Machine backup of the download link.
Here are the three versions of the link (20 biomes, 100 and 1000!)
20 biomes: mediafire.com/file/i20sqy32nwn2jh3/infinity20.mcaddon/file
100 biomes (recommanded): mediafire.com/file/idbcvu7qvcj1kse/infinity100.mcaddon/file
1000 biomes (not recommanded, because exceed mcpe biomes limit so does not add biomes naturally, but adds blocks): mediafire.com/file/73sudy5llto3r3s/infinity1000.mcaddon/file
Here is the Wayback Machine link: web.archive.org/web/20210512183206/
Be sure to enable all the experimental features (dont forget the new "Custom Biomes" feature to make this addon works !!!!!!)