Async data fetching not updating reactive data property

Ok, guys, I´m having a little issue today, all day long, trying to solve, the deal goes like this...

I´m fetching some data from firebase to render on the html template with asynchronous functions

I have a fetchList Method that is like this:

async mounted() {
      let ret = await this.fetchJobRequireList()
      console.log('fetchjoblist' , ret)

    async fetchJobRequireList() {
        // debugger
        let services = JSON.parse(sessionStorage.getItem('required_services'))
        services != null ? this.required_services = services : null

        let docs_ = []
        let result = []
        if (!services) {
          // this.required_services = []
          // get required services per user id
          let collections = this.$options.firebase.functions().httpsCallable('getRequiredServices')

          let docs = await this.$options.firebase.firestore().collection('required_services').get()
          // console.log('required services docs', docs)

          let _ = this
          for (let doc of docs.docs) {

            result[doc.id] =
            await collections({doc_id: doc.id}).then( async r => {
              // debugger
              let collections_ = r.data.cols
              docs_ = []
              _.required_services[doc.id] = []
              for (let collection of collections_) {
                let path = collection._referencePath.segments

                // let documents =
                let __ = _
                await this.$options.firebase.firestore().collection(path[0])
                  .doc(path[1]).collection(path[2]).get()
                  .then(async documents => {
                    // console.log('__documents__', documents)
                      for (let doc_ of documents.docs) {
                      doc_ = await documents.docs[0].ref.get()
                      doc_ = {
                        id: doc_.id,
                        path: doc_.ref.path,
                        data: doc_.data()
                      }
                       // debugger
                        __.required_services[doc.id].push(doc_)
                      console.log("this?", this.required_services[doc.id], '__??', __.required_services)
                      docs_.push(doc_)
                    }
                  })
              }
              console.log('__docs__', docs_)

              return docs_
            }).catch(err => console.error(err))

            // console.log('this.required_services', this.required_services)
          }



        }
        // console.log('object entries', Object.entries(result))
        // console.log('__this.required_services__', Object.entries(this.required_services))
        // sessionStorage.setItem('required_services', JSON.stringify(this.required_services))
        return result

      }

The expected result would be for the data function properties to be update after the firebase response came, but no update is happening.

If anyone, have any clues, of what could be happening... some people told me that asynchrounous functions could cause problems... but there is no alternative for them, I guess...