in R12.2 Web and Forms services are provided by Oracle Application Server and Oracle Fusion Middleware. so there is no tech_st.
Go through the below R12.2 concepts so you can clear your self
Oracle® E-Business Suite Concepts Release 12.2 Part No. Part No. E22949-09
The docs is not so clear
Can you give me sample blog/docs, on how to clone database home only , then I will restore using RMAN backup for the data?
You have to run adcfgclone with TechStack option
perl adcfgclone.pl dbTechStack
Cloning Oracle E-Business Suite Release 12.2 with Rapid Clone (Doc ID 1383621.1)