Yes, this is normal. As part of the installation process, another Python package, pandas, is being updated, which takes a few minutes.

In the Python Package Manager, click the Update Packages button to see the packages available to update. Find the dltsolutions package and click the Update button to update the tools.

The dltsolutions package will only be available if you are using the most current version of ArcGIS Pro, or no earlier than 2.4. If the most recent version of the dltsolutions package is still not listed, install it using the Python Command Prompt and the following command: conda install -c esri dltsolutions and ensure the package is being updated to the most current version.

If you don't see dltsolutions in the Python Package Manager, first, verify that you're running ArcGIS Pro 2.4 or later and created a Python project environment. Once you've cloned your environment, browse to the Add Packages dialog box, and click Refresh to reload the list of available packages. Follow steps 3 through 6 in the Install the dltsolutions through the Python Package Manager workflow.

If your network intercepts SSL traffic, conda will fail to refresh the list of available packages in the Python Command Prompt. You can still install the tools, but you need to use the Python Command Prompt. Ensure you've created a Python project environment, and install the tools using the following steps:

1. In the Windows Start menu, browse to the ArcGIS folder.
2. Click the drop-down arrow next to ArcGIS and click Python Command Prompt to open the window.
3. Verify that the first line of code displays the name of your cloned environment before continuing.
4. Once confirmed, type conda install -c esri dltsolutions --insecure and press Enter.
5. When the installation is complete, close the Python Command Prompt and start ArcGIS Pro to confirm that the Data Loading Tools toolbox has been added.

Yes. You'll need to manually download the tools, copy them to your machine, and use the Python Command Prompt to install them. To get started, complete the following steps:

1. Click dltsolutions to open the Anaconda Cloud page containing the Data Loading Tools toolbox.
2. Choose a version of the dltsolutions that aligns with your version of ArcGIS Pro and download the .tar.bz2 file.
3. Save the file locally on the machine where you want to install the tools.
4. In the Windows Start menu, browse to the ArcGIS folder.
5. Click the drop-down arrow next to ArcGIS and click Python Command Prompt to open the window.
6. Type conda install "<path to downloaded .tar.bz2 file>" --verbose and press Enter.
7. When the installation is complete, close the Python Command Prompt and start ArcGIS Pro to confirm that the Data Loading Tools toolbox has been added.

To view the toolbox, first close all instances of ArcGIS Pro that are running. Then, start ArcGIS Pro again so the geoprocessing cache updates. The tools should now be visible.

Review the Python in ArcGIS Pro page to learn more.

If you need support for the Data Loading Tools toolbox, contact Esri Technical Support. Alternatively, to get help from community members, post your questions in Esri Community.