What is the problem with Nuxt rendering?

the Nuxt.js framework is used for seo optimization in the program. After the release, I looked at the source file and found that I didn"t know how to deal with 2 problems.
1: check the source file and find that the component name of vue appears, which should not be rendered by the server.
2: the contents of the tag are not displayed in the source file.

as shown in the figure:

the tag name swiper-slide appears in the source file. There are multiple li tags in the tag named guest-list in
ul, but not shown in the source code. But it does show up on the interface. Is there anything that needs to be configured?

I don"t see this happening in other people"s examples.
Thank you.

Jul.08,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1eaf2a9-4f704.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1eaf2a9-4f704.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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