Absolutely you are not alone!
There are many Soviet Tu-154s in 1:400 and few Il-86 and Il-96.
I hope for some more, at least those visiting Salzburg until the ban of the year 2007 (noise reduction and the Tu-154, Il-86 and Il-96 engines produced an immense noise especially during landing and takeoff).
Hoping to be wrong but i don't think someone will produce Tu-154s, Il-86s and Il-96s. Maybe the il-62 production will continue (not so interested in it).
Maybe there could be a birth of SSJ-100 and Tu-204/214 production in 1:400 scale: Russia has a desperate need of spare parts for its Airbus and Boeing fleets but with the war, the sanctions and the embargo there will not be replacements for the next years (The Donald allowing...). So Russia is trying, and maybe being able, to produce 100% national components SSJ-100 and Tu-204/214 with the possible entering in service of the Yakovlev MC-21.
But, at the same time, if i don't think that the manufacturers working following license rules will make deals with Russian Sukhoi, Tupolev and Yakovlev; maybe the manufacturers/brand producing models without asking license could give to 1:400 scale a plenty of beautiful Russian models.
Personally speaking i would like Red Wings, Vladivostok-Avia and Transaero Tu-204/214 and all the SSJ-100 flying (wonderful airplane even with a lot of structural, engines and avionics problems).
However the real fact Is that, like 1:500 scale, Soviet models don't sell very well and maybe even Tu-204/214, MC-21 and SSJ-100 would not sell very well. Today collectors prefer Airbus and Boeing models and western old classics like Dc-9, Dc-10, B707 etc. Very sad.
About Tu-154, Il-86 and Il-96 these would be great addition to my Soviet fleet:
Gazpromavia (old livery)

Continental Airways

Aviaprad

Air Union (the only Russian Alliance)

Pannon Airlines (Hungary)

Aviation400 (leasing Bulgaria Air Charter Tu-154s)

Yamal Airlines

Kras Air (Il-96)

Vaso Airlines (Il-86)

AJT Air International (Il-86)
