Alder Lake is probably the last CPU lineup to be produced exclusively by Intel's fabs. After that, Intel plans to gradually outsource CPU lineups to TSMC, with the low-end Core i3 models scheduled to be produced by the Taiwanese fabs in the second half of 2021. A year later, TSMC is also expected to begin mass-production for Intel's mid-range and high-end processors on the 3 nm nodes.
https://www.notebookcheck.net/TSMC-expected-to-produce-Intel-Core-i3-chips-on-5-nm-nodes-in-2H21-3-nm-high-end-chips-coming-in-2H22.515008.0.html