Here is a link to a great Masters thesis by Ian Bacon that discusses why there will be literal animal sacrifices in the Millennial Kingdom when Jesus returns. Notably, Bacon avoids the “symbolic” and “memorial” views in favor of a more exegetically-defensible “ritual-purification” view. He also avoids the Hebrew Roots error that the Temple sacrifices represent the reinstitution of the Mosaic Covenant.

“The Plausibility of Animal Sacrifices in Ezekiel 40-48 Literally Opera” by Ian Bacon (