Microcontroller Power Supplies and Power Sequencing
There are 2 requirements from what I can see:

The generic I/O power (see section 2.5 in the datasheet) should all ramp up together and can precede \$V_{DDR}\$ although \$V_{DDR}\$ can ramp up with the generic I/O power; the LV supply should follow this.

In section 3.4.1 (Recommended operating conditions for 3.3V operation) there is a caution:



VDDE_C and VDDA must be the same voltage.
VDDMB and VDDMC must be the same voltage.

I take that to mean they must be supplied from the same source. This could easily be overlooked as they are stepper motor supplies where a designer might (for thermal purposes) use separate regulators but here that should not be done.
Apart from that, there does not appear to be any other sequencing or supply dependencies.
There are some general guidelines in section 3.4.2:

Connecting power supply pins: What to do and what not to do
• Do: — Have all power/ground supplies connected on the board from a
strong supply source rather than weak voltage divider sources unless
there is “NO I/O activity” in the section
— Meet the supply
specifications for max / typical operating conditions to guarantee
correct operation
— Place the decoupling near the supply/ground pin
pair for EMI emissions reduction
— Route high-noise supply/ground away
from sensitive signals (for example, ADC channels must be away from
SMD supply/motor pads)
— Use star routing for the ballast supply from the VDDR supply to
avoid ballast startup noise injected to VDDR supply of the device
— Use LC inductive filtering for ADC, OSC, and PLL supplies if these are
generated from common board regulators
• Do not:
— Violate injection current limit per I/O or All I/O pins as per specifications
— Connect sensitive supplies/ground on noisy supplies/ground (that is, ADC, PLL, and OSC)
— Use SMD supply for generation of noise free supply as these
are most noisy lines in the system
— Connect different VDD pins (connected together inside the device) to different potentials.

These are all reasonable guidelines.