“You also will be cut off” is for Gentiles

Not for the Believers

Romans 11:13
New King James Version (NKJV)

¹³ For I speak to you Gentiles; inasmuch as I am an apostle to the Gentiles, I magnify my ministry,

Romans 11:22
New King James Version (NKJV)

²² Therefore consider the goodness and severity of God: on those who fell, severity; but toward you, goodness, if you continue in His goodness. Otherwise you also will be cut off.