Hi Erwin,
There are no plans yet to include USB 3.1 (in terms of speed transfers) on i.MX processors. USB 3.0 was included starting i.MX8 series of i.MX processors.
In terms of other compatibility, you could add Power Delivery and USB-C connector with current USB 3.0 controller, like the implementation on the i.MX8 MEK and EVK boards.
For additional parts related to USB-C or USB 3.1, you could take a look to the following links:
USB Type-C and Power Delivery Evaluation Kits | NXP
PTN36502 - Type-C USB 3.1 Gen 1 and DisplayPort v1.2 combo redriver | NXP
Hope this will be useful for you.
Best regards!
/Carlos
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