Solved Succecfully installed but NO kunena at components

You cannot import tables if they already exist. It seems that you have not done these steps correctly.
www.kunena.org/forum/installation-issues...ents?start=20#224294
It's hard to help if you have no experience with databases. With a single mistake, you can destroy your website beyond repair. Then you have to reinstall the old Joomla 3.10 site and start all over again.
Don't you have anyone who can help you carry out these steps?

Thank you Rich.
Unfortunetaly I don't have anyone who can help me.
I am children's book writer, and not familiar with web developing very much and try to do everything myself for several years.
This website is not financial one and it is not business.
So I cannot pay a lot to professionals to make it work.
Maybe I can do it myself? If you could help with instruction?

hello i have put a video's on  my test website  Film and Film2

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about exporting in import with phpmyadmin.
it's not the best movie but  and unfortunately this explanation test films is dutch but I hope it can put you on the right track
so export the kunena items from the database of your old website backup.
then remove the kunena items from your current database and import that of your old database.
but watch out for that sulfix of your old and new database must be the same
@Leen The address to your video is not available for users if you use confitential tags.
@rich  thank you modified hidden from guests now

@Leen The address to your video is not available for users if you use confitential tags.

@uzbaby
Go to your created database with the old tables. Select only these Kunena tables (see picture). Then scroll down and select Export in the dropdown menu and click OK. After the export you will find this file in your download folder. 
You must then import this file into your Joomla 4 database.
Then try to install Kunena 6.0.3.
But make a backup first. It's easy with Akeeba Backup if you don't have anything else.
.
 

 Thank you very much!I exportet kunena files only. You can see the selection in the attached file.Then I start to import them to the site.Here is my kunena data SQL file. Maybe there is some problem?

Hello  I think your link is not safe to show  sql data publicly put it between the secret tags or delete it.