Here's a few examples, maybe you missed them in your research.
https://coronavirus.jhu.edu/vaccines/timeline
https://www.ncirs.org.au/phases-clinical-trials "COVID-19 vaccines are being rolled out for emergency use authorisation in several countries. However, as there are limited safety data, full registration of the vaccine will only be given after extended safety monitoring, which will take several years.
https://research.northeastern.edu/heres-what-it-takes-to-test-a-covid-19-vaccine-with-clinical-trials/ " a process that usually takes three to five years of rigorous testing for safety and effectiveness."
https://www.gavi.org/vaccineswork/how-covid-19-leading-innovation-clinical-trials
"On average, vaccine development can take 10-15 years. "
https://www.jnj.com/innovation/the-5-stages-of-covid-19-vaccine-development-what-you-need-to-know-about-how-a-clinical-trial-works
"It can take up to a decade to go from vaccine discovery and development to approval"