Great that you mentioned the beta values, the coefficients in the tables are in fact unstandardised beta coefficient values, this has been made clearer in the tables. The tables have diet (ind variable) on the left and the dependent variable KS-10 is on the top to indicate that interaction, then this is stratified by gender. I hope this makes more sense now.
The regression analyses “p” value is reported, but the beta values and significance must also be reported. The regressing table needs reworked, as it is the influence of diet the independent variable on wellbeing KO-10, the dependent variable. If the focus is on gender typically both a boy and a girl regression model is reported.