I have noticed that all images on my site which I align ‘center’, doesn’t show centered, but are aligned left. Is there something I can do about this? My site is NSFW, so let me know if you need the url.
You can use the ‘Image’ Block of Gutenberg Block feature which is under Common Block category then you can align the images easily.
To use the Image block and other Gutenberg features just by clicking on plus icon (+) on the top left corner of post/page editor and you can find Image Block under Common Blocks tab pane (category).
May be you are doing with the ‘Custom Html’. So please instead of ‘align’ attribute use the class ‘aligncenter’ on the img tag. Example class="aligncenter".