You may be surprised to know that the molecule you highlighted is already in your body, vaccine or no vaccine.

https://hmdb.ca/metabolites/HMDB0008036

Happens to be, 1,2-Distearoyl-sn-glycero-3-phosphocholine is just a fatty acid molecule that can be utilized as an inactive ingredient for drug delivery, or in this case, delivery vaccine components to whatever target area.

These fatty acid related molecules are already in existence within the surface of your cells, some transverse the lipid bilayer of your cells in fact. It's one of the reason these fatty acid molecules are used in the vaccine, they exist in your body already and are completely safe.

So when the long term data is released on these vaccines, if any issues arise, it won't be because of the inactive ingredients. Will likely be the active ingredients that might trigger some sort of side effect.