If you hold down an app or option, you can use it to select additional options or move an app. However, the response time may be extremely long until the corresponding option appears by pressing and holding.
If this is also the case with your Huawei P20 Pro, then you should definitely check this option in the settings: "Reaction time when holding down" If this is set to "Length", then you have the case described above. The option can be found or deactivated here in Android:
1. Open the settings
2. Scroll down to "Intelligent Support". Select the entry from
3. Continue to "Assistance". Scroll down the list. Here you will now find the option "Response time when holding down"
4. Touch the option and then select "Short"
This will make the response time when pressing and holding apps considerably shorter and faster, which has a positive effect on the haptics throughout.