WordPress automatically flushes paragraphs to the left. I have manually entered some paragraph indents but will no longer do this. It is not necessary and takes up valuable publishing and editing time. If your writing is submitted with paragraph indents, know that once it is published it will not appear that way. There will be spaces between the paragraphs, but no indents. Thanks for your understanding.
“A first-line indent is the most common way to signal the start of a new paragraph. The other common way is with space between paragraphs. First-line indents and space between paragraphs have the same relationship as belts and suspenders. You only need one to get the job done.”
First-line indents | Butterick’s Practical Typography