Trace Length difference for memory and MKL02 chip

Hi, im making a custom teensy 4.0 pcb and I'm wondering how much wiggle room I have trace length wise with data lines of the memory and the MKL02 that connect to the MIMXRT106 chip. Is there an equation I could use to figure this out?
 
Traces between MKL02 and RT1062 aren't length critical, as the signals are fairly low speed (only a few MHz).

But traces between RT1062 and flash memory are high speed signals. Match their lengths closely, and try to keep them fairly short.
 
No, because even the solder flow on a pad varies the conductor length much more than that (±0.1mm, mostly because the pad is not exactly flat, or always form exactly same fillet shape).
 
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