So does the CDC quote suggest the CDC is considering there may be a causal connection between the vaccinations and Myocarditis/Pericarditis?
No causation is implied, it is the rate of reporting the condition following vaccination. It would be up to further studies to draw a direct link, however 884 cases over 220 million doses is not very compelling statistics. I think you have more chance of getting myocarditis from a lightning strike, inclusive of the chance of being hit.