Hi, your weight have to be manually added in the Fitbit app on your mobile device, cause that can change day by day. If you've entered it in the Fitbit app and sync is with your Versa, assuming that you have weight activated in the Today screen, it will show up on your Versa. On the other hand, why would you want your weight to be shown on the Versa if the Fitbit app is already showing it? The less items you activate in your Today Screen, the longer the battery will last. I have only activated HR in the Today Screen, cause it tells me somewhat more that the Third Party Clock Face I'm using. The Today screen takes about 2 to 5 secs to load depending on the activated activities. The Clock Face I use takes no time at all to show all the stats I want. This Face is called "The Digital One" developed by Marc Azara and you can find it by Clocks - all Clocks - and type in the search bar azara and you will find it. Costs a mere 1.1$ after a trial period of 30 hrs and it's worth every penny of it. The main display is just the Digital time - date/day and whatver you want and a very slight tap on this dsiplay shows you directly all the stats you want, e.g. steps - floors - calories - distance - active minutes and HR.
