The Knowledge Base shows that Vcc (0.9V), and Vccp (1.8V) should come up before Vcceram (0.9V), Vccr_gxb (1.8V), and Vcct_gxb (0.95V). This requires splitting the voltages and adding power switches to sequence the voltages. Is this required?

[BAdam1]

What are the ramifications of not sequencing these power rails? Does it cause configuration issues, functional problems, or long term reliability issues?

[BAdam1]

This is for a Cyclone 10 GX device. The device part number is 10CX085YU484I5G.

[Busy]

Intel recommends power sequencing... If you do not respect them, correct behaviour is not guaranteed and the causes of the dysfunctions may be difficult to detect.

AN692 can help you...

[JonWay_C_Intel]

Thanks @Busy​  Just to top up some info for @BAdam1​ , you may also want to refer to the https://www.intel.com/content/www/us/en/programmable/documentation/vua1487061384661.html#qwj1528888537561

You will need to follow the sequencing, to guarantee the reliability and not to damage the device.