Two questions....I bought TP link 3 way switches to add to my house because while I have plenty of Wemo switches, up until this year, they did not have a 3 way switch.  With that said, I have run into the following issues:

1. Based on all of my reading, I apparently need to purchase a tp link smart router to add the auto off functionality to their smart switches.  For example my kids leave the bathroom lights on all day and I would like to schedule it to turn off after 60-90 minutes like I can with Wemo switches.  According to the app I need a smart router which seems completely unnecessary to add a simple feature.  Is there a way to make this work?  I have Alexa, IFTTT and google home hubs as well so I can use basically anything other than buying a smart router.  Help!
2. Is there any way to have the light switches turn on at sunset +/- a specified period of time like I can for Wemo switches?  I typically do sunset + 30 minutes because it is still light out for a while after sunset.

If the answer to both of these questions is no, it looks like I'll be switching over to Wemo 3 way switches when they come out later this year.