It is not clear from your post do you have a confirmed booking? @Valentin149 What are previous reviews like regarding host communication?
If the host hasn’t responded to your booking request then I would look for alternative accommodation with an established superhost who offers Instant Book.
It appears the host has request to book on so the host has 24 hours to respond to your request. To ensure you have somewhere to stay, I would recommend to cancel your request and look into contacting other host using the contact host option as well as looking into listings that have instant book turned on. Using the contact host option will allow you to enter reservation dates and send a message to the host. The good thing is when using the contact host option, you can reach out to multiple host to ask any questions or concerns you have without submitting an actual reservation request.