But are you talking software development? And if so, is that because key systems like source control/ticketing/chat/meetings etc. are all cloud-hosted and don't require logging into the domain/VPN etc.? If so, I'd still count that as "logging in", in the sense, they're online and interacting with other co-workers.
Most of our work is about interacting with entities outside the company.
Bots usually take source code that is hosted outside the company do do things internally, such as QA, and then publish the result externally or to some internal channel that is accessible from outside the usual IT systems (IT workarounds). It's complicated to tell you without going into details.
As long as everyone in a team feels like other team members are collaborating effectively (vs holding each other up) that doesn't sound like a problem, but it's hard to imagine how that's possible without regular communication between team members which implies some sort of "logging in", even if it's just via WhatsApp...
