i have a minecraft realm, and i have attempted many farms in 1.16 that i have previous not tried before, so pardon me if i am missing something obvious. i first started a villager breeder, but the villagers were unable to pick up things to breed with like bread. they would simply stare at it until either i picked it up or it despawned. i couldn't get it to work with any villagers i encountered, or even ones i spawned in. so, i scrapped that idea to work on something else, an iron farm. after my previous 1.15.2 design that was poorly built produced minimal iron and would constantly stop working, i went with a new, compact design by wattles. it worked for a week or so, then i noticed it simply stopped. somehow, even though the zombie had no direct access to the villagers whatsoever, one of the villagers was gone. so, i replaced him, then it still wouldn't work, so i killed the zombie, let a couple days in game pass, then replaced it. i missed the nametag on the zombie so i had to get a new one again, and finally it started working again. that i found odd, but all's well that ends well. next, i built a design for a guardian farm by shulkercraft, and at first i thought it was working, so i afk'd it (from 128 blocks up in the sky) for maybe 15 minutes, and noticed a meer dozen or so drops in total. so, i afk'd it repeatedly for about 4 15 minute or so sessions, and the same issue, almost no drops. i tried moving away in a different direction, which seems to help for about 15 seconds, then it would just stop again. finally, i tried bartering with piglins in the nether, and they simply ignored the gold i threw at them. no reaction whatsoever. they did stop attacking since i had gold boots on, but they simply walked past and walked over the gold ingots i threw at them. i'm genuinely confused on what is going on, because i don't know of anybody else who is having these problems.