Creating nested object from keys

gistfile1.js

const
    setValue = (object, path, value) => {
        const
            indices = { first: 0, second: 1 },
            keys = path.replace(new RegExp(Object.keys(indices).join('|'), 'g'), k => indices[k]).split('.'),
            last = keys.pop();

        keys
            .reduce((o, k, i, kk) => o[k] ??= isFinite(i + 1 in kk ? kk[i + 1] : last) ? [] : {}, object)
            [last] = value;
            
        return object;
    },
    data = { "dynamic.title": "Lorem Ipsum title", "dynamic.main_section.header.title": "Lorem Ipsum main section header title ", "dynamic.main_section.body.collection.first.title": "Lorem Ipsum main section  body collection first title", "dynamic.main_section.body.collection.first.description": "Lorem Ipsum main section  body collection first description", "dynamic.main_section.body.collection.first.id": "Lorem Ipsum main section  body collection first id", "dynamic.main_section.body.collection.first.child.first.title": "Lorem Ipsum main section  body collection first of first child title ", "dynamic.main_section.body.collection.first.child.first.id": "Lorem Ipsum main section  body collection first of first child id ", "dynamic.main_section.body.collection.first.child.first.url": "https://loremipsum/1", "dynamic.main_section.body.collection.first.child.first.names.first": "John Doe", "dynamic.main_section.body.collection.first.child.first.names.second": "Jane Doe", "dynamic.main_section.body.collection.second.title": "Lorem Ipsum main section  body collection second title", "dynamic.main_section.body.collection.second.description": "Lorem Ipsum main section  body collection second description", "dynamic.main_section.body.collection.second.id": "Lorem Ipsum main section  body collection second id", "dynamic.main_section.body.collection.second.child.first.title": "Lorem Ipsum main section  body collection second of first child title ", "dynamic.main_section.body.collection.second.child.first.id": "Lorem Ipsum main section  body collection second of first child id ", "dynamic.main_section.body.collection.second.child.first.url": "https://loremipsum/2", "dynamic.main_section.body.collection.second.child.second.title": "Lorem Ipsum main section  body collection second of second child title ", "dynamic.main_section.body.collection.second.child.second.id": "Lorem Ipsum main section  body collection second of second child id ", "dynamic.main_section.body.collection.second.child.second.url": "https://loremipsum/3" },
    result = Object
        .entries(data)
        .reduce((r, [k, v]) => setValue(r, k, v), {});

console.log(result);

tested: pass🙃