Hello Mathane,
I apologize for the delay in answering your question.
As a straight answer, yes, according to the documentation of the IMX8M, There shouldn't be any problem with supporting of LPDDR4. Although you will have to use de DDR stress tool, modifying the RPA according to your memory.
This is the community link for the DDR Stress Tool: https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-8M-Family-DDR-Tool-Release/ta-p/110...
I hope this information has been useful.
Regards,
Fabian.
Best Regards,
Fabian
