mysql innodb cluster 3 nodes, 2 lagging almost 24 hours
Hello for those out there with similar issues I fixed it thanks to this amazing blog post.
https://thoughts.t37.net/fixing-a-very-lagging-mysql-replication-db6eb5a6e15d
basically my changes: 


STOP SLAVE;
SET GLOBAL slave_parallel_workers=40;
START SLAVE;
set GLOBAL sync_binlog=0;
SET GLOBAL innodb_flush_log_at_trx_commit=2;
SET GLOBAL innodb_flush_log_at_timeout=1800;`


I already had the MT setup so just needed to add this and 40 workers.
Hope this will help other people..