@LaxminarayanaPlease use the forum tools to format your output. Hard to read when you just copy/paste.
I can see the error right here in your logs;
2020-11-11T08:55:03.813542Z 0 [ERROR] [MY-000067] [Server] unknown variable 'wsrep_sst_auth=xtrabackup:rahyeQu5wee4eiSaepheW1aweiroh5ar'.
2020-11-11T08:55:03.816571Z 0 [ERROR] [MY-010119] [Server] Aborting
Are you sure you are using the latest version of the operator? Looks like v1.6.0 is the current GA version. Please upgrade to that version of the operator before attempting again. If you are indeed on 1.6.0, then this is a serious bug in the operator that needs to be addressed. The parameter wsrep_sst_auth was removed in PXC8 and should not be present in the scripts.