God absolutely does assign us faith ‘according to the measure that God has assigned’.

“For by the grace given to me I say to everyone among you not to think of himself more highly than he ought to think, but to think with sober judgment, ††EACH ACCORDING TO THE MEASURE OF FAITH THAT GOD HAS ASSIGNED.” Romans 12:3

“… formerly I was a blasphemer, persecutor, and insolent opponent. But I received mercy because I had acted ignorantly in unbelief, & the grace of our Lord overflowed for me with the ††faith and love that are IN Christ Jesus. “. 1 Timothy 1:13–14

*Grace overflows for us WITH faith & love.
We don’t receive grace because of our Faith, we receive Faith because of HIS Grace.

“Faith is the assurance of things hoped for, the conviction of things not seen.”. Hebrews 11:1

**How do we have assurance, how do we have conviction?  Only through the Spirit of God! We can’t muster up assurance, nor can we muster up conviction apart from God. He is our Faith.

That’s why the apostles said to the Lord, “Increase our faith!” Luke 17:5

They didn’t muster up faith for themselves, God gives Faith.