Referred source
when I run the command
phpcs --standard=Drupal --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml
for you module
I found this
FILE: /var/www/html/web/modules/contrib/configuration_batch_export/src/Form/DownloadConfirmForm.php
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FOUND 1 ERROR AFFECTING 1 LINE
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29 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "NULL" but found "null"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/web/modules/contrib/configuration_batch_export/configuration_batch_export.info.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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8 | ERROR | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/web/modules/contrib/configuration_batch_export/configuration_batch_export.routing.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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13 | ERROR | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/web/modules/contrib/configuration_batch_export/configuration_batch_export.install
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FOUND 5 ERRORS AFFECTING 5 LINES
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1 | ERROR | [x] Missing file doc comment
3 | ERROR | [x] Missing function doc comment
4 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 4
5 | ERROR | [x] Line indented incorrectly; expected 2 spaces, found 4
6 | ERROR | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 5 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/web/modules/contrib/configuration_batch_export/README.md
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FOUND 1 ERROR AND 6 WARNINGS AFFECTING 6 LINES
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3 | WARNING | [ ] Line exceeds 80 characters; contains 132 characters
13 | WARNING | [ ] Line exceeds 80 characters; contains 87 characters
26 | WARNING | [ ] Line exceeds 80 characters; contains 193 characters
27 | WARNING | [ ] Line exceeds 80 characters; contains 98 characters
28 | WARNING | [ ] Line exceeds 80 characters; contains 108 characters
34 | WARNING | [ ] Line exceeds 80 characters; contains 88 characters
34 | ERROR | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/web/modules/contrib/configuration_batch_export/configuration_batch_export.links.task.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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5 | ERROR | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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I created patch for the above