DELETE restAPI request returns 204, but entry is not deleted

not saying this is case closed but after a lot (and i mean a lot, basically about 3.5hrs) of debugging, trial and error, I changed backend/src/api/verification-token/controllers/verification-token.ts from

/**
 * verification-token controller
 */

import { factories } from '@strapi/strapi'

export default factories.createCoreController('api::verification-token.verification-token');

to:

import { factories } from '@strapi/strapi'

export default factories.createCoreController('api::verification-token.verification-token', ({ strapi }) => ({
  async findOne(ctx) {
    const { id } = ctx.params;
    console.log(`Fetching token with id: ${id}`);

    const entity = await strapi.entityService.findOne('api::verification-token.verification-token', id);
    if (!entity) {
      console.log(`Token with id ${id} not found`);
      return ctx.notFound('Token not found');
    }
    
    console.log(`Token found: ${JSON.stringify(entity)}`);
    ctx.body = entity;
  },
}));

and now findOne works completely as expected.