I need all the screwdriver sizes to repair the lightning connector on

You might need different screwdrivers depending on what job you're planning on doing, but the bare minimum is a pentalobe screwdriver, a phillips screwdriver and a tri-point screwdriver. iFixit sells all of these and they come with a lifetime warranty, so if you'd like to support their repair efforts, consider buying from them.

Of course you need a special 5-pointed screwdriver just to get into the phone in the first place.

P2 Pentalobe Screwdriver iPhone - iFixit Store

Next, a standard Phillips for the majority of the work.

Phillips #00 Screwdriver - iFixit Store

And a special three-pointed screwdriver (tri-point) just to keep you from messing with stuff Apple doesn't think you have any business touching.

Tri-Point Y000 Screwdriver for iPhone 7, Apple Watch and More

There is one more you might consider; a stand-off screwdriver. These are screws that hold something down and have a hole in the middle to put another screw through to hold something on top as well. If you're going to be messing with the lightning connector you might want one of these.

Standoff Screwdriver for iPhones - iFixit Store

You can also get all four in one set, including a little tiny nut driver for about $20 USD.

Marlin Screwdriver Set - 5 Precision Screwdrivers for iPhone - iFixit Store

I've opened up quite a few different kinds of Apple products and this set would get me through any job I've done so far.

Good luck with your repair!