BizTalk does have an Oracle DB adapter, if that's what you mean.
HRMS is the Oracle PeopleSoft system? If so a bit unclear about what sort of interface it is apart from it being XML based, which BizTalk does. This page even mentions BizTalk https://docs.oracle.com/cd/E16071_01/hr91pbr0/eng/psbooks/ecih/chapter.htm?File=ecih/htm/ecih13.htm
ERP is a very generic term. What ERP system are you referring to?
Maximo and Primavera look to expose REST APIs, so as long as you are using one of the later version of BizTalk that has the WCF-WebHttp adapter, you should be able to consume those services.