Just to clarify: Initially, the NCAA gave everyone whose sports were impacted in 2020 an extra year to play their 4 years of ball. So, that might be why some people think that you only get 4 years total.
But the NCAA later just said that anyone in school in 2020 gets an extra bonus year to play regardless of whether 2020 truly impacted them or if they had already played 4 years. This means everyone could play 5 years if desired.
To use a football example, look at Bo Nix:
Played a full season in 2019, 2020, and 2021 at Auburn
Then played a full season in 2022 and 2023 at Oregon
Five full seasons.
Or perhaps a better example, did everyone remember hearing the announcers talk repeatedly about Jack Kiser for Notre Dame and how many games he has played? Here are his season totals:
2019: 4 games (redshirt)
2020: 11 games
2021: 13 games
2022: 13 games
2023: 13 games
2024: 15 games (and counting)
Five full seasons plus a redshirt