[devonnull]

I don't use Google. Instead I turn to:

https://theforest.link/

https://indieblog.page/

https://blogroll.org/

https://ooh.directory/

https://personalsit.es/

https://blogsearch.io/

[cosmicgadget]

Also worth mentioning the goat:

https://marginalia-search.com/

And some others to check out including blog posts about discovering blog posts on this blog post:

https://outerweb.org/blog/web-discovery.html

[Imustaskforhelp]

Are there any indexes which index all of these too?

[devonnull]

I don't know. All of those sites seem to be small, personal passion projects. I'm sure that more than a few people with personal blogs submit to all of them