Yes, they are output.
Operations performed using TableMaintenance are output to the table maintenance operation log in SQL format.
By the default settings, they are output to the following path.
${Accel Platform log directory}/product/tablemaintenance/tablemaintenance.log
For more information, please see the following document:
* intra-mart Accel Platform Log Specifications
Table maintenance operation log
https://document.intra-mart.jp/library/iap/public/im_core/im_log_specification/texts/specific_log/table_maintenance/edit.html
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iAP/Accel Platform/2015 Summer or later
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FAQID:1487
Are operations performed with the TableMaintenance function output to in logs?