@Elnnina mentioned Sure-Fit designs, which is a great system. There are also 2 other systems that I am familiar with. Fit-Nice Designs and Lutterloh.
Lutterloh requires the most drafting work, and it uses miniature patterns that are expanded during the drawing process to your particular size. You get a pattern that is specific to the style of garment you are making. You have to buy the drawing kit which includes a specialized tape measure for expanding the drawings into your pattern. Several times a year they release a new pattern book with about 30 pattern drawings in it. You cannot buy individual patterns, and they are extremely thorough about keeping copies of their pattern drawings off the internet. I have and like this system, but rarely do their books have patterns I'm interested in, and you have to pay for 30 patterns to get the one you want. There are zero sewing instructions. They assume you know how to sew and are only providing the pattern.
Sure-Fit uses a basic pattern that is drawn to your measurements, and offers design kits to draw different designs with the standard pattern as a base. The system is divided up into various packets. The basic packets gives instructions for using the system and making a variety of designs, and there are additional packets that each have a selection of several designs. It offers some education in how the patterns are put together, and how to turn a basic pattern into a stylish garment.
Fit-Nice gives you a basic pattern, already drawn to multiple sizes and extremely basic. All the designs are in one large and expensive book. I don't know how much instruction is included.
This video gives a comparison of both Fit-Nice and Sure-Fit. The lady has many videos of her projects with both companies. The videos are useful and informative, but I'm pretty sure she has something other than just coffee in her mug! I must watch her in limited doses.
https://www.youtube.com/watch?v=prnA8f5-AD0If you really want to get down to the nitty-gritty of drafting patterns from scratch, I have 2 books I can recommend.
Coordinated Pattern Fit by Jan Minott was written in 1969 to be used in a class on the subject, and my copy was obviously never intended for commercial sale. I don't know if it was ever re-published in a commercial version, and therefore may be hard to find. It goes into great detail on creating a custom pattern sloper for bodice, sleeve, and skirt, and ends with how to use this sloper to make pattern adjustment to commercial patterns, giving you access to a custom-fitted version of nearly every pattern, except pants, made by every company.
How to Draft Basic Patterns (4th edition) by Kopp/Rolfo/Zelin/Gross is a professionally-printed book. The drawings are much nicer, being computer-generated rather than hand-drawn. It gives charts of "average" measurements for a range of sizes, which would be nice for making practice drawings or if you plan to draft patterns for sale, but not of much use for making a custom pattern. This book goes beyond the basic sloper, and tells you how to covert it into a princess seam, caftan, pants, jump-suit, and coat, but not style options, and
not how to use it to alter a commercial pattern.
Lastly, on Craftsy there is a series of videos by Suzy Furrer on drafting each sloper and creating design options. I own all of these, and if you like video instruction rather than books, these are well worth your time and money.