I'll do my best again:
1. Covid is believed to bind to ACE2, angiotensin-converting enzyme 2. This receptor breaks apart angiotensin protein to regulate a number of bodily functions, like stabilizing blood pressure. Covid's spike proteins use the receptor to invade healthy cells. Once attached to and inside cells, the virus replicates inside the cell and then starts causing problems throughout the body.
2. Based on my understanding, targeting the ACE2 receptor is being researched more to look at drug therapeutics rather than vaccination options. It looks like scientists are not in total agreement about what it means that coronavirus exploits ACE2. Some people think that adding more ACE2 into the body, through drug therapeutics, the virus will become confused and bind to the drug rather than onto your cells. Then it can't replicate and spread, ideally. But no, the vaccine will not prohibit ACE2 receptors from functioning normally. Think about pathogens (virus) and antibodies (your body's immune response) as like a lock-and-key. Specific antibodies bind to specific pathogens.