Has anyone here moved a high-performing ASIN from 3P/FBA to Vendor Central (1P)?

Anyone here transitioned a high-performing ASIN from 3P/FBA to 1P/Vendor Central? Curious what kind of volume changes you saw post-switch.

We recently moved an ASIN for a FBA Seller to our VC account doing ~500 units/month via FBA to 1P in early May. Just received the first PO this week—685 units, ~$20K. Based on our experience and vendor cadence, we expect weekly POs going forward at around 50% of the ASIN’s historical monthly sell-through.

For those who’ve made the jump:

• How did your PO frequency and volume evolve?
• Did Amazon eventually order closer to full sell-through rates?
• Any operational adjustments you had to make?

Trying to get a broader sense of how others have seen 1P scale over time.