By my calculation your formula is:

Borax .................................................. 18g
Ascorbic Acid..........................................6g
p-aminophenol as sodium aminophenolate.....1.04g
Sodium Hydroxide.....................................0.96 g
Sodium Sulfite..........................................4 g
Water to................................................ .1L

I think it is an analog of the metol-ascorbate developers eg this from Pat Gainer:

Borax............................................. ........24.4g
Sodium Hydroxide.......................................6g
Ascorbic Acid............................................8g
Metol............................................. .........0.8g
Water to................................................ .1L

Metol is effectively replaced by p-aminophenol.

P-aminophenol was dropped fairly early on in favor of metol which acts faster, but in solution p-aminophenol as aminophenolate is more resistant to atmospheric oxidation so your developer may keep better.
It would be interesting to know if the pH of your developer is just over 9.
IDK what is the pH of Gainer's formula but it maybe there is sufficient Borax to buffer it around this value.I don't think it is really known how well these metol ascorbate developers keep in full sealed bottles but would suggest store some of yours for a while and see if it still works would be interesting.