Cypress get elements within specific path

Automating some tests with Cypress, I've found this issue.

We are asking many questions to the customers and these question will appear one-by-one depending on the previous answers. The next question (and for instance the kind of answer) will be unknown until it is shown. I leave this here as an example in which every 'div' (not 'rootDiv') is a question and they are only shown when the previous one has been responded.

    <div class="rootDiv">
        <div class="type1">
           <div class="type1b">
              <button class="button1">
              <button class="button1">
           </div>
        </div>
        <div class="type2">
           <div class="type2b">
              <button class="button2">
              <button class="button2">
              <button class="button2">
              <button class="button2">
           </div>
        </div>
        <div class="type1">
           <div class="type1b">
              <button class="button1">
              <button class="button1">
           </div>
        </div>
        .
        .
        .
       <div class="typeX">
           <div class="typeXb">
              <button class="buttonX">
              <button class="buttonX">
              <button class="buttonX">
              <button class="buttonX">
           </div>
       </div>
    </div>

So the issues I am facing are:

1. Is there a way to access to the last 'div' within 'rootDiv', check its class and based on it click any of the buttons?
2. Is there a way to get the 'text' written on the buttons of the last 'div'?
3. Is there a way to have a list of elements (buttons in this case) and iterate through them?

There are many options to solve it, the main problem relies on how to get to those elements