DA is not really important to SEO. If you have big sites linking to yours, your DA will increase, which is great for your rankings. Or you can manipulate DA so your site has more, but it is pointless in my opinion and google will not rank you higher, simply because you have a higher DA than someone else. Look at the serps, tons of number 1 sites have low or poor DA as they are using hidden PBN's, so AHREFS, Majestic and Moz cannot crawl them... However, their sites are super powerful.
DA is a pointless metric and unless you are selling links from your site, should be ignored.