So you've got two attack vectors: network & IPC
Problem: WeChat is connecting directly to undesirable web domains & sharing data through the network interface
Solution: use a firewall like RethinkDNS to block specific web connections, i.e. block calls to google.com.
Potential Issue: WeChat may refuse to work without these network connections, you'll have to test each one
Problem: WeChat is collaborating with installed third-party apps, like Google Play Services, to communicate over IPC
Solution: IPC can't really be blocked within a given profile. You can move WeChat to a separate profile, or a Private Space - IPC comms are bound to the singular active profile
Potential Issues: toggling between profiles or configuring a private space may be inconvenient
Juuer app log shows that WeChat still stealing my location data from google services
What do you mean by this? What logging tool are you looking at? What data is it showing?