Hi @Yves - welcome!! Unfortunately, many owners do not respond to all applicants or are slow to communicate with them. Some people are busy. Some are new to THS and figuring out how to use it (maybe they don’t have notifications turned on. maybe their plans are not firmed-up yet and they don’t want to start talking to a sitter before they know their plans). Some are just inconsiderate.
This has been discussed in several other posts – I suggest taking a look through those comments:
Some sitters withdraw applications after ~48 hours if there’s been no response.
You are not obligated to anyone you’ve submitted an application to. It’s ok to apply to multiple sits over the same period, especially if one owner has had a few days to respond but has not done so.