Where do you get the ios 17.5 beta version?

We cannot discuss the Beta here. To get the Beta you must be enrolled in the Beta program.

click here ➜ Apple Beta

Note the following:

Apple Beta Software Program

Is the public beta software confidential?

Yes, the public beta software is Apple confidential information. Don’t install the public beta software on any systems you don’t directly control or that you share with others. Don’t blog, post screen shots, tweet, or publicly post information about the public beta software, and don’t discuss the public beta software with or demonstrate it to others who are not in the Apple Beta Software Program. If Apple has publicly disclosed technical information about the public beta software, it is no longer considered confidential.

Read our Terms for full details

 No Support and Maintenance; Future Products. During your participation in the Beta Program or in a particular seed, Apple is not obligated to provide you with any maintenance, technical or other support for the Pre-Release Software. If, at Apple’s option, such support is provided, it will be provided in addition to your normal warranty coverage for your computer and/or device. You agree to abide by any support rules and policies that Apple provides to you in order to receive such support. You acknowledge that Apple has no express or implied obligation to announce or make available a commercial version of the Pre-Release Software to anyone in the future. Should a commercial version be made available, it may have features or functionality that are different from those found in the Pre-Release Software licensed hereunder.

As you’re seemingly a developer based on having posted this here, log into the developer portal and download what you need from there.

Start here: Apple Developer

Log into your developer account using the Account tab, then select the available downloads.