In the three seasons previous to the last one teams in the PL averaged about 0.4 - 0.5 extra points from every home game, compared to their away games.
In 20/21 PL teams got an average of 0.068
less points per game in home games than in away games (i.e. it was pretty much even).
And the difference between those seasons wasn't "not travelling" or "sleeping in a different bed". Supporters affect the performances of teams.
Home and away tables in Premier League and relative home/away performance overview for each team.
www.soccerstats.com