NEWS. FINISHED. SOLUTION AND CONCLUSION.
At last e os is running in my Redmi 9 lancelot.
Solution was: It must be installed FROM MIUI 12, NOT 13.
Conclusion: Guide must add this specification. As a requirement, installing eos in lancelot must be done from MIUI 12 (Android 11). So, if user has miui13 (A12), system must be downgraded to previous version.
Thank you all for your interest, concern, advices and participation.