I think what you’re asking about has already been requested in at least one Wishlist topic:
I’d be inclined to vote on that one and comment about the specific Action you’d like to see implemented (there’s a long list near the beginning of the topic) plus detail about why (like the use case you mentioned).
Additionally, I recall seeing it mentioned in a related topic that Actions don’t run sequentially:
I don’t know if that’s still the case or not. I haven’t attempted any detailed testing of that specific property of Automations. If Automations still work that way, then including a delay (if you could) wouldn’t have a predictable meaning and wouldn’t meet your requirement for consistency.
I recall being surprised to read at the time that Wyze Automations (Rules then) worked that way (non-sequentially), because I tend to automate things with Google Home, where Actions can be re-ordered and delays can be included in Action sequences. I don’t think expecting steps to execute sequentially is unreasonable.