I can't seem to directly link, but here's a pdf on reducing sugar in canned foods:
Source: UC Agriculture and Natural Resources
https://share.google/wej419euTIAcbqcmo
Basically - sugar keeps colour/texture long term, as does salt, but it doesn't really matter to the long term safety of the food.
Also helpful:
https://www.ndsu.edu/agriculture/extension/publications/play-it-safe-safe-changes-and-substitutions-tested-canning-recipes
I adjust my canning recipes to suit ME in terms of salt/sugar/spices. Omitting garlic isnt going to make a recipe unsafe, nor is adding peppercorns or whatever spices I like. I find most canning recipes either bland, or unpleasant as written. I am more careful about size of pieces/types of veggies as the density matters. I keep quantity of veggies, water, and vinegar consistant.
For pickles - i tend to grow dual use slicing/pickling cukes. I have also seen reliable sources saying zucchini can be subsituted for cucumbers in sliced pickle recipes, so I do that, too.
This is my favourite recipe site for tested recipes - they seem to agglomerate recipes from many sources.
https://www.healthycanning.com/
I do find canning limiting. (And time consuming!). I freeze a lot, but also experiment with storage crops that dont need preservation - what's the earliest green i can grow? What's the latest? Wow, if i leave my fall grown carrots in the ground over the winter, they are still tasty and crunchy in the spring! Yay, my winter squash lasted all winter in my basement. Darn, no, leeks do NOT survive the winter in my climate. Etc. And i supplement in the winter with hydroponic greens. I do adjust my diet to what is easy to grow and preserve.
I also have experimented with other ways to dry things than my dehydrator - chilis and beans strung on strings, slowly air dried quince paste, etc. At this point in my life, i can applesauce (no sugar needed!), jams (i love low sugar pectin!), relish, and a few pickles.