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In Exodus 12, God proclaims the Passover will be celebrated in perpetuity.
14 ‘This day will become[al] a memorial[am] for you, and you will celebrate it as a festival[an] to the Lord—you will celebrate it perpetually as a lasting ordinance.[ao] 15 For seven days[ap] you must eat[aq] bread made without yeast.[ar] Surely[as] on the first day you must put away yeast from your houses because anyone who eats bread made with yeast[at] from the first day to the seventh day will be cut off[au] from Israel.
Never again would He pass over Israel, but the celebration would be forever celebrated and served two purposes:
1. To never forget their miraculous deliverance from slavery, in fulfillment of His promises
2. To foretell their ultimate deliverance by Messiah. As such, the Passover is rich in symbolism of Him. It looks forward to The Lamb of God.
For these same reasons, Israel will resume Temple sacrifices in the future, but the they will not forgive sin, but continue to memorialize the sacrifice of Him and the deliverance of the sin of Israel.
Thank you for your response.