en_tn/rom/03/23.md

come short of the glory of God

Here the "glory of God" is a metonym that refers to the image of God and his nature. AT: "have failed to be like God" (See: rc://en/ta/man/translate/figs-metonymy)

they are freely justified by his grace through the redemption that is in Christ Jesus

Here "justified" refers to being made right with God. You can translate this in an active form. AT: "God has made them right with himself as a free gift, because Christ Jesus has set them free" (See: rc://en/ta/man/translate/figs-explicit and rc://en/ta/man/translate/figs-activepassive)