Visit some Garden Centres near you- often they'll have seed mixes of local perennial flowers available for purchase, you just need to spread the seeds in the spring or autumn.

Also, "weeds" aren't always weeds, they're just plants that some people decided get in the way of monocultures. If it's flowering, it's feeding insects, so leave it be.

The fireflies are awesome in my area this summer and my humble yard is part of that. It's honestly so satisfying watching plants come back year after year, bigger and bigger

I'd check for native species of clover, which is invasive in most of Canada.

Given that you are asking in a thread that is the subject of fireflies, we are going to assume you are asking for suggestions to improve firefly accommodations.

In this regard, do not ever clean your yard of any loose leaf vegetation or damp rotting vegetation and it will attract fireflies. Do not remove the weeds unless you can positively identify they are harmful to people, or are invasive non-indigenous. Go to nearby privately owned plant nurseries and ask them for native species for your garden. They will be significantly more expensive to purchase from, and will likely be less aesthetically pleasing plants.

~~If you don't care about insects, and are asking simply to project to us a fake progressive personality, then resume decorating your yard with non-native invasive species from your local commercial/franchise garden center, from what it sounds you are currently doing.~~