reporting-engine/report_xlsx/readme/USAGE.md

An example of XLSX report for partners on a module called `module_name`:

A python class :

from odoo import models

class PartnerXlsx(models.AbstractModel):
    _name = 'report.module_name.report_name'
    _inherit = 'report.report_xlsx.abstract'

    def generate_xlsx_report(self, workbook, data, partners):
        for obj in partners:
            report_name = obj.name
            # One sheet by partner
            sheet = workbook.add_worksheet(report_name[:31])
            bold = workbook.add_format({'bold': True})
            sheet.write(0, 0, obj.name, bold)

To manipulate the workbook and sheet objects, refer to the documentation of xlsxwriter.

A report XML record :

<report
    id="partner_xlsx"
    model="res.partner"
    string="Print to XLSX"
    report_type="xlsx"
    name="module_name.report_name"
    file="res_partner"
    attachment_use="False"
/>