Not unless you have a Variac.
Standby switches, that switch on an off B+ extend the life of tubes by proper use. You see, when you switch Standby on (B+ off), the filament is free to turn on and warm the tube up. Then you can switch Standby off (B+ on) to get the amp going. Once warmed up, you can turn Standby on or off as you need without having to subject the filament to in rush current. The tube should last longer, even if kept constantly on. Just like a standard incandescent light bulb will last longer if turned on and never turned off. Most tube guitar amps have this and I would say only about half of guitarists use it correctly or even know what it does. I doubt any Schiit stuff will get a Standby switch anytime soon and if you add an automatic turn on it really doesn't help, unless you can turn the B+ off and keep the voltage going to the filaments. And a Standby switch is more hardware, more stuff to go wrong, hard to explain how to use, tubes are not covered under warranty past 90 days, and it may cause a "pop" in your headphones that is no good. That pop maybe okay for large guitar and bass amp speakers, but not so okay for sensitive headphones.
The other way is to ramp up voltage slowly to the heaters (filament) with a Variac. Engineers who work on tube amps should have a Variac to test circuits anyway. Not suggesting to always use it, unless you are crazy about maintaining the life of your tubes to the maximum amount.