The last time to request to buy a P1 is June 30, 2022. An attempt will be made to fulfill those orders, as well as any previous orders and contracted buys out of available stock.
The P2 will be available to some early access customers in April 2022, with general availability in June 2022. There will be an overlap period where both are available to allow customers to migrate.
The P2 does not have CAN, so that would require a board re-spin. There are other differences, as outlined in the P2 Migration Guide.
The is unfortunate, but Cypress has discontinued the WM-N-BM-11 (P1) and there is no choice but to migrate to a different MCU. The best choice was to put a different MCU on a pin-compatible-ish module to the P1.