Asynchronous is all well and good but people need to know that, at their point of need, that appropriate support is there.
That doesn’t mean the LnD function being there 24/7 but being able to show people where they can get help, support, guidance and information. That’s not down to the LnD function but a management activity.
Helping managers support people at their moment of need should be part of any learning design. Good learning practitioners will make sure managers know they have to have presence,