1) For iOS, I have found the best method to be an iPad. You can set your iPad to share your location: "Use This iPad as My Location" and leave it plugged in at whatever location you choose. With this you don't have to worry about my co-worker or sister sending me random inquiries "Why were you at this bar at 2am?" 😅 Then when you get home you can just switch it back by selecting the same option on your iPhone "Use This iPhone as My Location".
For Life 360, not sure if there is a way to swap between devices.
Google's location sharing via Google Maps does NOT let you switch between devices easily. It seems to choose what ever device it sees as active.
2) Alternatively, you can get a cheap e-sim for you other phone like $10 for a month (and you can cancel when not in use). This would give you a small amount of data to use, a phone number, etc.
3) Start kicking people that are being nosy about your life off your friend follow apps. lol I literally just did this.