" For the distance between a toilet and a tub, code generally requires 15 inches from the toilet's centerline to the tub's edge, with 30 inches center-to-center between fixtures and at least 21 inches of clear space in front of the toilet for usability, though local codes (like IRC/IPC) and specific layouts (e.g., toilet in front of tub) vary, so always verify with your local building department for exact rules. "

I should have mentioned that the toilet is perpendicular to the tub, i.e when one is on the toilet, they are facing the tub. The distance from the front of the toilet to the tub's side wall would be only 22" with a new non-elongated toilet.

" I should have mentioned that the toilet faces the bathtub "

Be a lot simpler if you just attached even a hand drawn floor plan with dimensions.

See above.

The 2021 International Residential Code (IRC) requires a minimum 21 inches of clear space in front of a toilet, measured from the front of the bowl to any wall or obstruction.

OTOH, local code may be more restrictive. California requires a minimum clearance of 24 inches in front of toilet, tub, vanity.

The recommended minimum floor space is at least 30 inches from the front edge of all fixtures to any opposite bath fixture, wall, or obstacle.

California follows UPC instead of IPC. The 24" clear is in front of toilets.

Thanks for all your comments. The toilet is now installed.