Problem: I have a one-to-many relationship set up between two post types. In the child post single page, I would like to display a View of other sibling child posts.
Solution: This feature does not currently exist in Blocks, but in classic Views you can create a Query Filter for post relationship, where the parent post is set by a shortcode attribute "wpvrelatedto". Then you can provide the current post's parent post ID in the View shortcode as shown here:
How to create a form to set the site logo in the front end form.
Solution:
In most cases, the WordPress site logo value is stored in your database "wp_options" table, but Toolset Forms can not manage data in that table, so there isn't such kind of built-in feature within Toolset Forms.
And in your case, you can consider custom codes, for example: