Is Apple intentionally de-prioritizing Find My network updates for older devices?

Don't worry it is no cover up, posts are routinely closed when the OP is no longer participating in the post or it has become stale. You will see in the post you referred to, it is has not had any follow up in nearly 2 months with OP being the last posted a day after the initial post. In addition, that post was referring to iPhone 17 & iPhone 16 where your question seems to be referring to older devices. You do say your devices are up to date, but not sure what iOS version you are referring to and certainly there could be changes in update frequency in iOS versions and possibly even with devices, since newer ones have a greater battery capacity. It is not documented, but certainly possible.

Apple will NOT address any issue here as this is a Support Site made up of users just like you where Apple does not participate in providing any support. If you want to contact Apple directly, then you would need to do that here:

Contact Apple Support - Apple Support

If you are using a closed account and the fact that Apple did not respond as your reasoning for credibility on your statement, then you came to that conclusion from false assumptions.

This is a public forum where replies are by other users like yourself, not Apple. After a post has had no replies for several weeks it will be closed. It’s not a conspiracy, or deprioritizing Find My for anyone.

If you want assistance from Apple support you will need to call or chat them directly.

Apple is not here.

They do not read or reply to any posts here.

This is a user to user support forum.

If no one replies to your post it’s because no one here knew the answer.

As pointed out by another poster, if you want an answer from Apple you have to contact Apple.