Can be directly transferred into your mouser cart by copying & pasting the text below into the mouser part list import tool (you may need to log in at mouser before the tool is available):
https://www.mouser.com/tools/part-list-import.aspx

810-CGA5L2X7R1E105MA|2
80-C1206C104M5R|3
798-MDF78S254DSA55|1
595-SN74HC595DR|1
595-SN74HC165D|1
571-12150790|1
652-CR1206-JW-102ELF|1
652-CR1206JW-104ELF|6
652-CR1206JW-103ELF|8
660-MF1/4LCT52R223G|6
642-3FTH9|6
642-1S11-22.5|6
652-PTL30-15R0-103B1|6
611-THB001P|1
595-LM4040A20IDBZR|1

These parts are not required for a normal build - in general: don't buy them! They would go to the greyed-out locations specified as DNF ("do not fit") in the BOM above. If you want them anyways, e.g. for a special usecase, you can also copy & paste them into your mouser cart:

583-BAT54S|1
571-12150790|1

You can manually add these to your cart using the links below. If you are buying a midiphy essential kit, these should be included already. If you are buying plain PCBs, these are necessary to complete your build.

^* Disclaimer: although we have taken the best care possible, we cannot guarantee 100% accuracy and we cannot be held liable for erroneous orders when using this tool, including (but not limited to) incorrect quantities and/or types of components ordered through midiphy or other suppliers.