Best honeymoon spots in Southeast Asia?

We’re thinking Thailand and Bali. I’ve been to both (loved Ubud and the islands in Thailand/Chiang Mai) and my partner hasn’t been to either. Are there other spots we might be missing that might be cool to check out? I’ve heard Philippines is amazing but I’m not sold yet.

Also, any tips for Thailand and Bali- specially which islands are best for Thailand are appreciated. Thank you!!!