WFH can enable flexibility on both parts. But, it's highly variable depending on the employer. I might be able to slip out and go to a dentist appointment in the middle of the day without using comp leave, etc. If the employer allows me that flexibility, I may be more willing to be more flexible to respond to an email or a message after hours on occasion. The flexibility is give and take between the employer and the employee.
Now, I understand that not everyone wants that. For me personally with kids to deal with and family things that come up here and there, I much prefer the flexibility and the occasional work evening that's a bit later or the occasional work morning that's a bit earlier. Then I can save my comp leave time for when my kids are out of school or I want to plan a vacation rather than using it up on the small trivial things throughout the year.
I'm on 128 on my phone. I just checked and both of those are disabled for me.