Google+ is now only available for G Suite customers, and it is no longer available for consumer (personal) and brand accounts.
Learn More: support.google.com/plus/answer/9217723

G Suite customers may see some changes to Google+ features related to the consumer
Google+ shutdown. You can talk to your G Suite administrator to learn more
(support.google.com/a/answer/6208960), or you can find more details here:
support.google.com/a/answer/9229693.

You can also expect a new look and new features soon. Learn more:
cloud.google.com/blog/products/g-suite/new-enterprise-grade-features-in-googleplus-help-businesses-drive-collaboration

From version Google+ for G Suite 11.11.0.309656376:

• Performance enhancements and bug fixes.

Apps related to Google+ for G Suite

Version:2022.04.24.444096598.release

Uploaded:May 12, 2022 at 6:22PM UTC

File size:15.5 MB

Version:10.28.0.239896912

Uploaded:March 30, 2019 at 1:34AM UTC

File size:19.59 MB

All versions

Version:11.11.0.309656376

Uploaded:June 5, 2020 at 9:43PM UTC

File size:16.46 MB

Downloads:2,689

Version:11.10.0.305602887

Uploaded:April 20, 2020 at 8:27PM UTC

File size:16.44 MB

Downloads:731

Version:11.9.0.298221384

Uploaded:March 26, 2020 at 8:45PM UTC

File size:16.55 MB

Downloads:531

Version:11.8.0.295829650

Uploaded:March 4, 2020 at 6:30PM UTC

File size:16.57 MB

Downloads:303

Google+ for G Suite 11.7.0.292814713

Version:11.7.0.292814713

Uploaded:February 13, 2020 at 9:36PM UTC

File size:16.49 MB

Downloads:339

Google+ for G Suite 11.6.0.288933932

Version:11.6.0.288933932

Uploaded:January 21, 2020 at 11:11PM UTC

File size:16.58 MB

Downloads:417

Google+ for G Suite 11.5.0.283245530

Version:11.5.0.283245530

Uploaded:December 21, 2019 at 1:07AM UTC

File size:16.5 MB

Downloads:528

Google+ for G Suite 11.4.0.278372697

Version:11.4.0.278372697

Uploaded:December 11, 2019 at 11:43PM UTC

File size:16.53 MB

Downloads:452

Google+ for G Suite 11.3.0.273600579

Version:11.3.0.273600579

Uploaded:November 1, 2019 at 10:28PM UTC

File size:23.65 MB

Downloads:363

Google+ for G Suite 11.2.0.269622364

Version:11.2.0.269622364

Uploaded:September 20, 2019 at 7:00PM UTC

File size:19.49 MB

Downloads:492