contacted mee6 customer support and they informed me that
MEE6 code was made private a long time ago, and when it comes to documentation it was moved to these support pages:
https://help.mee6.xyz/support/home
https://mee6.xyz/en/tutorials
for any other users who come here looking for information regarding the levels, support said in response to the question:
Q: is there an equivalent page to https://github.com/Mee6/Mee6-documentation/blob/master/docs/levels_xp.md in the documentation you linked above?
A: Regarding XP, to my knowledge, no. At least not an official one. However many users asked similar questions and we found these pages made by MEE6 users that reflect numbers accurately (per our devs response):
https://docs.google.com/spreadsheets/d/e/2PACX-1vSV2eP7s1fIyu3j2KKQxWxSYKsdou2kBQJv68H4zTFiwz0zjS4ntMWS1P70hvvSYQ/pubhtml?gid=1696074448
https://mee6-calculator.realsgii2.dev/
contacted mee6 customer support and they informed me that
for any other users who come here looking for information regarding the levels, support said in response to the question: