How to make a dynamic template in expressjs?

Question

Node.js

The question has been ripe for a very long time, because the question always remains what's next ?, and always at the same stage
And so the essence
What I want to get:
- each section is independent and receives data from the database along a separate route
- each section has its own data and connections between tables
(/features, /clients, /products...) How to correctly create a dynamic site template (for example, I took a landing page) specifically for
nodejs-express
). I cut the static template (in sections), one section is separate for the template (static), then I link everything together
in index.ejs .

<%- include('layout/head'); -%>

<%- include('navigation'); -%>
<!-- /.navigation -->

<%- include('header'); -%>
<!-- END HEADER -->

<%- include('main'); -%>
<!-- /#main.main -->
<%- include('features'); -%>
<!-- /#features.features -->

How to make each section dynamic, I take data from mysql (each section has its own table with data, etc.).
How to implement it correctly?
1) For each section, create your own GET request and make a request to the server via ajax? as for me not a very reasonable solution, especially if there are many sections.
2) Create a single query to the database on the root route - if there is very little data, then it will do, but a very bad solution.
3) Create separate GET requests (for each section) and use the Angular framework to refer to these routes in JSON format, for example?

const connection = mysql.createPool({
    host: 'localhost',
    user: 'root',
    password: '',
    database: 'bd_cardboard'
});


app.set("view engine", "ejs");
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

app.use(express.static(__dirname + '/public'));

/*Routing*/

app.get('/', function(req,res){
    res.render('index');
});

app.get('/features', function(req,res){
    connection.query('SELECT features.title, features.descr, features.photo_id, photos.path, photos.category, photos.exp, photos.altText FROM features\n' +
        'INNER JOIN photos WHERE features.photo_id = photos.id;', function(err, rows){
        if(err) throw new  Error;
        res.json(rows);
    });
});

I will be grateful for your help! I really want to get to the bottom of this!