Run setblock command in Minecraft to change villager into pig
Solution 1:
It is not possible to directly convert an entity into a different entity. The best workaround is to summon a pig at the villager and kill the villager.
Like so:
execute as @e[type=villager,tag=villager1] at @s run function namespace:convert_to_pig
function convert_to_pig:
summon pig ~ ~ ~
tp @s ~ -500 ~
kill @s