Exhaust code after. repairs to oxygen sensors. and. fuel injectors

1990 with 35000 miles. Oxygen. sensor Code happens frequently and repairs have been done. Does. the whole exhaust system need to be replace?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0