Not true! Heaven and earth would have to pass away in order for God's holy law to end (Luke 16:17).
No. . .as long as time exists, the Mosaic law
with its curse (Gal 3:10) will not pass away
until it is accomplished.
Grammatically, you are confusing the time frame of the condition (duration of heaven and earth),
with the condition itself (its fulfillment) for its passing.
Its shadows, copies, patterns (Heb 8:5, 10:1) have been fulfilled/accomplished in Christ (Col 2:17).
The Mosaic law has been
set aside (Heb 7:18-19),
abolished (Eph 2:15) and
replaced with the law of Christ
which is the law of God (1Co 9:20-21; Gal 6:2) and the law of love (Gal 5:6, 14; Jas 2:8; Ro 13:8-10),
accomplishing God's law (1Co 9:21) which now has
no curse.
The law of Christ (Ro 13:8-10) with no curse, is not the Mosaic law with its curse (Gal 3:10).
The word of God is forever true: the Mosaic law has been set aside and abolished (Heb 7:18-19; Eph 2:15).