The Lufthansa 'North Winter' season schedule is probably near final at this point (though changes are still possible). There are definitely some seasonal changes (summer vs winter) to where LH deploys the 744/748, though some routes tend to keep them year-round (not a given, of course)

Any plane assignments after late March 2024 are subject to change still over the next many months, though LAX and SFO do seem to generally keep the 748 year round.