The simplest way from where you are is to have a virtual switch in Hubitat shared to IFTTT. Change your IFTTT recipe to turn on the Smart Life switch AND the Hubitat switch. Can IFTTT recipes have two actions yet? If they can't you need to make another action.
Then in HE you can have a Rule Machine rule that says... when that virtual switch is turned on (the one that the IFTTT will also turn on when it turns on your Smart Life switch because that switch status will sync back to Hubitat) do a thing. Your thing can be ignore based on the time of day, turn on other switches, or wait a period of time and then turn off, etc.
If you turn that switch off it will sync back to IFTTT. Then you have another IFTTT recipe that says if that HE virtual switch turns off then turn off the Smart Life switch.
In this scenario the virtual switch in Hubitat is then just a representation of the Smart Life switch.