According to the whistleblower @DylanDKT Apple will complete the transition period of Apple Silicon's self-developed chip research and development in the fourth quarter of this year, and with the release of the new Mac Pro, the entire series of Macs will use self-developed chips.
In addition, it is worth noting that the whistleblower said that the processor of the new Mac Pro will not be the rumored "M2" series, just a new member of the M1 series, but even this can bring more cores than the M1 Max.
DylanDKT also said that Apple may also have a larger screen iMac that will bring a higher-end chip than the M1 Max.
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