There has never been any outside contact in my therapy, with any of the therapists I saw.
Contacting one's T for any and all reasons deprives us of our sense of autonomy. How will we ever learn to self-soothe, cope with our emotions or even develop a sense of agency if the T is the first port of call.
Likewise, the time between weekly sessions is for personal processing and integration work. Seeing T several times also prevents that from happening and instead, develops dependence on T. I am always shocked at how permissive Ts are here. Scarily so as it seems to foster dependence rather than autonomy and independence.
And yes, I am very aware that this is not a popular opinion.