I'm in Singapore and have been testing workcations ranging from 4 days to 9 days (1 week + 1 weekend), especially in a week where there is a holiday in the middle. I put my remote work days here.

The ideal hotel for me for these workcations is a non-premium 5-star hotel like a Movenpick or Pullman that is a beachfront resort (not one near a beach but not quite a hotel with a beachfront or a usable beach, such as a number of Accor properties in Bali, Indonesia where you have to look at the photos carefully). You can get a refreshing work space near the beach for US$100-150/night, plus a Gold/Platinum room upgrade. Not looking for a Sofitel or Raffles on these stays.

Are there any particularly recommended properties in Southeast Asia that fit the above description? I say Southeast Asia because any property within a 2 hour flight of Singapore is an easy pick. Is there a way to search only beach hotels within Southeast Asia in the ALL app?

It's not so simple because, for example, the only participating Accor ALL property in the Philippines is Movenpick Boracay. It's a lovely 5-star hotel with okay restaurants (and the hotel next door has the top Argentinian restaurant in the country) and a great white sand beach. However, it's on an island with no international airport and is only feasible if you happen to be in Manila anyway for at least a couple of weeks. It's also slightly more expensive than some other Accor beach hotels. (Another Accor hotel that is not feasible unless already in Vietnam is Novotel Phu Quoc.)

Initial list would be (note a number of "beach" hotels are not directly beside the beach):

INDONESIA
- Sofitel Bali Nusa Dua Beach Resort (premium option on this list) EDIT: cannot meaningfully swim in the beach; disgustingly full of debris at high tide, knee or ankle deep at low tide, full of vegetation, shells and non fine sand
- Pullman Bali Legian Beach (excellent property, public beach across the road is full of garbage half the year)

THAILAND
- Pullman Phuket Arcadia Naithon Beach (very, very good but actual beach is a public beach beside it that has waves too strong for swimming and it's intermittently cleaned)
- Pullman Phuket Panwa Beach Resort (very low quality budget option for a Pullman and on far end of island)
- Sofitel Krabi Phokeethra Golf & Spa Resort (limited flights)
- Veranda Resort Pattaya - MGallery (limited flights)

VIET NAM
- Pullman Danang Beach Resort (beautiful beach but limited flights, average dining)

PHILIPPINES
- Movenpick Boracay (the only Accor beach hotel in the Philippines and a good one, but requires either a 2 hour land transfer or domestic connecting flight)