If u read the comments majority said 23% is very generous and it’s not just good but very good. Many Cofounders just get 5-10% and founding engineers get 1-2%
This is the reason I always say irrespective of Cofounders role, both should invest the money so there will be no equity bias
I have seen many who have been Founding Engineers working full time at their jobs and contributing their free time working with startups and getting around 1-3% equity only