What opportunities are locked behind skill proficiencies?
I keep trying to look through things as soon as I learned that because of XGTE you can only craft scrolls / magic items if you have proficiency in Arcana. And no matter where I look I don't see anything else locked off because you aren't proficient in the skill. I would like to know if are there things locked off that require proficiency in a skill?
For clarification, I'm asking for things you can't do without the proficiency not ones where it makes it much easier to do so, i.e., you can still stabilize creatures without medicine proficiency but it is harder to do so.
As an additional clarification, I'm not looking for things related to other proficiencies, including weapons, tools, and armor.
What I found out during research
Here's what I do know about the different skills:
Athletics- Grappling, avoiding grappling, and long/high jumping but it doesn't stop you from doing it if you aren't proficient
Arcana- The only one which stops you from making spell scrolls and magic items without it
Acrobatics- Preventing grappling, random item checks, and random dm checks
Animal Handling, Deception, Intimidation, Performance, Slight of Hand, and Stealth- Are checks that affect npc's but to do those checks proficiency only increases your odds to do so
History, Investigation, Insight, Nature, Perception, Religion, and Survival- Are just random checks for info but to do those checks proficiency only increases your odds to do so
Medicine- Helps stabilize creatures but you don't need to be proficient in it to do so
I'm not saying don't take prof in these skills if it's what your character would do, but I'm just wondering if I'm missing out on info like I did about spell scrolls and magic item creation.