I was under the impression that yes, lithium batteries do not require trickle charging and can sit for months and months while maintaining a charge—but this is when there is absolutely no draw on them. Our bikes, even when “off”, still have computers running in the background so that’s something to keep in mind.
For me, in practice, this has meant over the winter, I did not use a trickle charger but once a month or two, put it on the trickle for a day. No issues. If I were leaving the bike for a year, I’d put it on a lithium-specific trickle charger such as the CTEK Powersport charger, which accommodates both lead acid AND lithium with two different modes, and is therefore a good buy, IMHO.
Alternerively, if you already own a lithium-specific trickle charger and have the line in the garage easily accessible, theres no reason NOT to throw it on the charger when not riding. It can only help maintain the battery’s health.
My two cents.