Maybe you can't taste strawberry because you're over-using it. I see a lot of people mix with 10-20% flavoring...
Strawberry Ripe and Sweet Strawberry are both SBs that contain a lot of sweeteners that will also MUTE a flavor when used too much.
Just dial back a notch and try again.
SB Shisha from Inawere is a very dark and strong tasting SB. Not a very natural flavor to me, but it works well in certain blends, especially when combined with other, lighter and sweeter strawberries.
Also, watch how you steep your juices when using SB. If you're going breathe your juice and give it a hot bath, you might already give up. These are very volatile flavors and need to be locked in the bottle. If you want to steep them, don't steep them too long or the (ethyl) maltol in them is going to destroy your flavor, if it hasn't already been evaporated by incorrect steeping methods.