I think you want to look in the comp.xml file in this section
<!-- points for a win-->
<record>
<flags id="field" value="points_for_win" />
<translation id="name" translation_id="249508" type="use" value="Points For Win[COMMENT - competition stage rules panel, heading]" />
<flags id="type" value="integer" />
<translation id="hint" translation_id="344440" type="use" value="Number of points given for a win[COMMENT: advanced editor competition rules, league setup details]" />
<boolean id="is_optional" value="true" />
<integer id="default_value" value="3" /> <integer id="min_value" value="2" />
<integer id="max_value" value="6" />
</record>
Points for a draw and loss are then the other ones you need in the file.
File can be found in C:\Users\<Your computername>\Documents\Sports Interactive\Editor 2023\skins\editor\format\rule group\advanced
Until Cleiria said he thought it possible via modding the files I didn't even think of it, so credit to you @cleiriato open up my limited thoughts