iOS

1. Activate Developer Mode

1. Open User Settings

2. Open Appearance

3. Open Advanced

4. Activate Developer Mode

2. Select the right ID

1. Open the Users profile

2. Click Copy ID

3. You now have the ID in your clipboard.

Make sure you click Copy ID on a Profile, not on a message, server, channel or else. Doing so will result in just getting information from the Generic Snowflake