Search Filter MongoDB Nestjs - node.js

Question

When Implementing a search filter on a document withh populated documents and array of object, How can I enable the search filter to checkout the populated document or array for the searched word?
What I have only checks through the surface fields
async findAllFeedbacks(user: any, payload: FilterDto) {
if (payload.fields) {
const query = await this.distributionChannelsDocumentModel
.find({
[payload.fields]: {
$regex: `${payload.searchFilter}`,
$options: 'i'
},
})
.clone()
.where({ business: user.business })
.populate({
path: 'feedbackId',
// match: { 'feedbackId[payload.fields]': { $regex: `${payload.searchFilter}` } }
})
return { query, total: query.length }
} else {
const query = await this.distributionChannelsDocumentModel
.find()
.clone()
.where({ business: user.business })
.populate('feedbackId')
return { query, total: query.length }
}
}
Here is a response sample:
{
"query": [
{
"_id": "62a8645641b312b3a04a7233",
"feedbackId": {
"_id": "62a8642b41b312b3a04a722a",
"title": "Monthly Feedback test",
"questions": [
{
"title": "Rate Our Services test",
"subtitle": "Customer retention is our priority",
"type": "SMILEY"
}
],
"thankYouMessage": "Thanks for dropping a feedback",
"allowComment": true,
"allowEmail": true,
"allowFullName": false,
"allowAttachment": false,
"status": "Active",
"business": "62a83f5ab4b33de7307e9cb8",
"user": "62a83f59b4b33de7307e9cb6",
"createdAt": "2022-06-14T10:34:19.709Z",
"updatedAt": "2022-06-14T10:34:19.709Z",
"__v": 0
},
"user": "62a83f59b4b33de7307e9cb6",
"distributionChannelType": [
"email"
],
"meta": [
{
"sender": "string",
"subject": "string",
"positioning": "string",
"timing": "string",
"brandColor": "string"
}
],
"createdAt": "2022-06-14T10:35:02.092Z",
"updatedAt": "2022-06-14T10:35:02.092Z",
"__v": 0
},
{
"_id": "62b1c87510fae7f3a54b13b2",
"feedbackId": {
"_id": "62ac55d0b28630c3a8c9b940",
"title": "Yearly Feedback",
"questions": [
{
"title": "Rate Our Services",
"subtitle": "We love to hear from you! How is your Jumia food experience",
"type": "SMILEY"
}
],
"thankYouMessage": "Thanks for dropping a feedback",
"allowComment": true,
"allowEmail": true,
"allowFullName": false,
"allowAttachment": false,
"status": "Active",
"business": "62ac434542452ccb513f2241",
"user": "62ac434542452ccb513f223f",
"createdAt": "2022-06-17T10:22:08.863Z",
"updatedAt": "2022-06-17T10:22:08.863Z",
"__v": 0
},
"user": "62ac434542452ccb513f223f",
"distributionChannelType": [
"sms"
],
"meta": [
{
"position": "bottom",
"timing": "",
"brandColor": "#444"
}
],
"createdAt": "2022-06-21T13:32:37.895Z",
"updatedAt": "2022-06-21T13:32:37.895Z",
"__v": 0
}
],
"total": 2
}
In the above response, feedbackId is the populated document and questions is the array I would also want to search through when using the search filter