There are plenty of Youtube videos teaching how to find the gold within each type of bastion, which is a problem you are clearly facing, since you only found 2 gold blocks in your first one.
I recommend using Sodium, (a Fabric mod), if you aren't already, and learn how to E-ray.
Help me to find bastions! I have found one so far and i used creative mode for that, one bastion i found 2 gold blocks in it and it's like 20,000 blocks away i guess.