The Specific posts/pages block lets you build a list of posts (from any post type, including pages). It offers many of the options of the Unique posts block and displays in a similar style — but instead of filtering by categories and tags, it lets you choose specific posts/pages.
Click the plus icon to add a new block
Click the Specific posts/pages icon (you can start typing the name to search for it)
You can choose the specific posts you want from the controls in the sidebar when the block is selected, but you get more space to see what you’re doing if you click the pencil icon in the toolbar above the block
Optional: select the post type you’re looking for from the dropdown (including “page”) to filter to just that post type
Start typing in the “Search…” box to search the posts
Click the post/page you want to add to the listing.
Repeat to add more than one.
Optional: You can click and drag on a post/page you’ve added to the right-hand column to change the order
You can also remove a post from the listing by hovering over it in the right-hand column and clicking the remove icon at the right
Optional: After you’re done selecting/ordering the posts/pages you want in the listing, the other settings are just as easy to adjust in the right-hand panel.
You can switch the settings from inside the block to the right panel by clicking the preview button in the toolbar above the block (in the same spot where the edit button was).
The rest of the settings are essentially the same as the fields and layout sections of the Unique Posts plugin.