How much (I mean volume) of template have you started with?

Are you using kit for this? Can you share in details your protocol?

In order to address the low yield, you need to go through each step by step of your protocols starting from the culture preparations.

There are many reasons why your yield could be low. The more details you provide, the better.

A few reasons I have seen in the past for low yields include

too small of a starting culture, too poor of growth of a starting culture, "trying anyway" from a culture that didn't grow, omitting the antibiotics or using expired ones

using an expired kit, using the wrong kit (gDNA prep instead of plasmid prep), using a kit where ethanol evaporated from the wash solution (lid left open), poor cell lysis (user error), tossing the supernatant instead of transferring it, poking a hole in the column, not getting the elution buffer onto the membrane prior to the spin/elute step, forgetting to put a collection tube under the column . . . the list goes on. I'm not trying to say you are doing any of these things but it's just to show some of what can happen.

Is anyone else having this same issue and are you using any reagents in common?

As Amy Klocko mentioned, there are numerous potential reasons. Inherent characteristics of the plasmid or even the way you grow your culture can significantly affect plasmid yield, not to mention every single step in the protocol. For instance, I've encountered students who consistently obtained low yields simply because they forgot to add ethanol to the wash buffer. Therefore, the more details you provide, the better we can assist you.

we need more information to help. If isolating plasmid form e.coli buy a kit, they are all good today. I use NEB Monarch kits which give excellent yields (though nothing like the old CsCl preps I used to do decades ago).

Low plasmid DNA concentration after extraction can stem from several factors related to culturing, lysis, and purification. These include poor culturing conditions, insufficient bacterial lysis, loss of DNA during purification steps, or issues with the plasmid itself, such as low copy number or large size