One of the stories I sold this week I wrote back in 2017. It's been revised something like 6 times, and I didn't even start sending it out until 2019 where it started rounding up form rejections (9 of them in total).
I write first drafts super fast, but getting to a finished product takes me a while, and sending things out is a long haul, too. Patience and persistence pays off, and it's more than ok to be slow.