There are some wild rumors about a possible EOS-R7 APS-C camera coming in 2021. Without having any knowledge yet if this is really going to happen I have near zero doubts that this will eventually happen. The reason is quite simple. In this shrinking market it makes absolute ZERO sense for Canon to continue the EOS-M system.
I am pretty sure we will get an APS-C camera within 2 years and that current EOS-M users might be offered a big trade-in program to switch over.