OpenVPN does not use SHA-1 as packets authentication cipher.
It uses HMAC SHA1, so you just don't care about collisions. In the Control Channel you can also have HMAC SHA384. See also https://airvpn.org/specs
For a more thorough discussion see https://airvpn.org/topic/14837-control-channel-cipher-satisfactory/page-2#entry33173
does Eddie by default use HMAC SHA384 ? or it should be added manually ? if yes , then how to do it ?
It does not depend on Eddie, it's on OpenVPN. Eddie comes packaged with an OpenVPN version that supports it and will pick it by default. Otherwise make sure that OpenVPN in your system is up to date.
2.3.3 and newer will look for SHA384 , and eddie comes with 2.3.8 which mean i'm good