If i’m not mistaken, Toyota actually released a PSA due to Covid19 to “ready” your hybrid at least once a week for 60 minutes (if i understand correctly, putting it into “ready” is basically ignition on and ready to drive electric), leading the traction battery to charge the starter/auxiliary battery.
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.