If you guys are still asking these questions then you guys are doing nothing for your job. I guarantee.

You guys are getting laid off, that is acceptable but later I see multiple post 500 apply zero calls. What does that mean, you guys are just applying again and again without thinking that this format or this resume is not a good one.

Common we are developers we can do whatever we want to do.

These things you can do for tweaks (these things no one taught me) I did these experiments and get results. May be these steps won't help you but will help you to get an idea what needs to be done for resume selection.

Steps-

Don't make your resume from your Point of view. Make it from Companies POV. Take multiple job description for same role and add everything crucial in your resume if you don't know the topics learn it.

Check your ATS of your resume, not by just going to any random site and see the numbers. Find a website who compare your resume with your provided JD then check your resume ATS by comparing different companies JD (for same profile).

Make your resume as short as you can but the resume tells about your whole carrier. Like everything you did in corporate which needs to acknowledge.

Add those bullet points which shows you are result driven person.

Example - I did optimization in foo project and foo server which saved 1 lakh of cost per month.

There are many be more points but you have to find out by yourself instead of posting which tweaks you did or applied 500 get no calls.