Hello @Anih and welcome to the forum where you will find answers to most all your questions, including this one.
Yes, there are 100 upon 100’s of sits around the world so not sure why you are showing so few unless you have filters set for specific dates, pets, loations etc.
Also, can I suggest you link your member profile to your forum profile here at How to add a listing or profile link to your FORUM profile - Welcome & Getting Started - TrustedHousesitters Community Forum and follow the easy instructions. This will allow other members to easily view your profile and help you with added exposure to potential sits available in areas you are searching.
Let us know if you need more help.