This mailing list is only for reporting packaging problems and ask questions related to the packaging (not installation and use) of PostgreSQL. I recommend you look at this URL for professional services: https://www.postgresql.org/support/professional_support/.
As HA vendor, We provide high availability to PostgreSQL also. We support multiple versions of the PostgreSQL. We need your help to install PostgreSQL version 10.3 on RHEL 7 & 8 - x86-64.
Could you please help to install the specified version with documentations?