Yes, using Blogger with a custom domain can be good for SEO. It allows you to have a professional-looking domain, and Blogger provides basic SEO features. However, for more advanced SEO capabilities, some users may prefer other platforms like WordPress.
Normal (my theory) blogger with custom domain and have good high quality score content on it you should rank easy, when your keyword kd is not to high.
Blogger pages/ posts are in html right? Slim html pages/posts who loading blazing fast with high quality content on it, will rank fast in the serps.
When you use wordpress I think it's better make it the whole wp -static pages and post.
Make a test, use canva and create an html website with two pages and 15-20.000 words on it (example) then upload that thing to google cloud or Linode, then you will see how fast you get indexed and you get rank in the serp.
Note: only when you have high quality score content and a keyword which KD is not too high.
My theory is that you can rank with high KD keywords too where the big media guys ranking worldwide, for that your html pages need maybe 100-200.000 words on it (then upload to Linode or google cloud) -you have nothing to lose to make this test, then you can make your own observation and decisions. Doing this test for 2-3 months will cost your $15 on the low Linode vm.
Today with all the modern changes, modern google algo changes, changings come up fast, it's not bad to make small tests and own observations.
So then you will find the truth for yourself/ your niche, not what many people telling on forums like; blogger bnot ranks, wordpress(com) nort ranks blablablba....