If you're looking for a property with a swimming pool, the filter label varies based on the property type. For Freehold* properties, there is a filter specifically labeled Pool. It will be found further down the filter menu for the layouts Table, Map + Table, and Map + Card. In the Map and Consumer layouts, you'll find it under More Filters.
For Condo & Other* property types, you will have the option under the filter Building Amenities. The filter location is the same for Freehold properties.
*You can not search Freehold & Condo & Other together if you are looking to find properties with a pool.