When the Packers played at SF in NFCCG 2019-20, Packers 6 possessions in 1st half went like this:

5 plays-25 yards-punt
5 plays-4 yards-punt
3 plays-minus 11 yards-punt
6 plays-50 yards-fumble
3 plays-14 yards-INT
3 plays-1 yard-punt

Defense tried to hang in there for a while, it was 7-0 after 1st quarter. But it was 27-0 at halftime.

Offense needs to execute early, as they have been lately, to give the defense a chance.