How to type two layer words of Myanmar Burmese letters that are very common

[kyawaung]

I have been using Gboard and it is very suitable for all language letter typing. However, when we use samsung S pen, its functions work well only with samsung keyboard but this does not allow to type Burmese letter in double layers. Can anyone suggest how to type it if you know. Thanks

[Morrisemoe]

It may have been a long time with no response. I am adding in case someone like me still searching for answer..

In Myanmar Gboard after typing a letter, u can press shift key. Then u press the + key as shown. Then type the second letter.