Take the raspberries out of the freezer and set aside to partially defrost.
Put the cream, matcha powder, 4 tbsp maple syrup, vanilla, salt and gelatin powder into a small saucepan over over a low heat. Cook, stirring constantly with a whisk or hand-held blender, until the matcha and gelatin are fully dissolved, for about 5 minutes. Bring just to a simmer but do NOT boil.
Set the matcha cream mixture aside to cool for 10-15 minutes.
Mash the raspberries with 2 tsp maple syrup and 1 tbsp chia seeds with a fork. Place the berry mixture into the bottom of 4 glasses.
Gently stir the matcha cream and then slowly pour over the raspberries. Sprinkle a small pinch of chia seeds over the top of each panna cotta.
Refrigerate for 4 hours or until set.