Moses continues reminding the people of Israel what the previous generation of Israelites did.
Look … your God … before you; go up, take possession … your fathers … to you; do not be afraid, neither be discouraged
Moses is speaking to the Israelites as if he were speaking to one man, so these forms should be singular, not plural. (See: rc://en/ta/man/translate/figs-pronouns)
has set the land before you
“is now giving this land to you.” See how this is translated in Deuteronomy 1:8.