I got lapper in my server but missing drift scores and how to create speed gauge in it too?

How to add more thing in same lapper?

You need to download the Lapper script(s) you want and put them in the 'includes' folder.
Then you need to open the file called 'addonsused.lpr' and add the name(s) of the script(s) you want to activate.
Like this: include( "./access_screen.lpr");
After you changed and stored the file, you need to restart Lapper.

How to get scrores to list? Cant get, tried drift many laps but nothing in here.

Have you activated the Drift sections in the main Lapper script?
Some parts of the script are turned off by either a # at the start of the line or /* at the start of the section and */ at the end of it.
Which means that all the code between those tags, isn't executed.

it is in lfslapper.cfg?

No, you should look at file 'LFSLapper.lpr' which can be found in the 'default' folder.

First note: you posted in the wrong section
for LFSLapper questions go to: https://www.lfs.net/forum/262-LFSLapper-Development

-Which version do you use?

To store/retreive driftscores/laptimes, you have to change the $DefaultTopCar

Open LFSLapper.lpr (Bin/Default/LFSLapper.LPR)

Check attachment for info.