Itc not displayed in dashboard in gst

gud day all,

gstr2b  for the june month  shows the ITC AVAILABLE ,WHILE  in gst dashboard open page, its not being displayed.

although,only NIL return GSTR3B IS FILED for june(NO ITC IS CLAIMED).  while filing gstr3b of july, can i avail the ITC AS against the gst payment of july2021.

Also pls let me know the expiry period of the ITC  .TNX