Yes, exactly, but it has more potential limitations for phpBB.
But, in full version, phpBB is always loaded inside Joomla and SEF URLs are always generated.

All our extensions were adopted to new major version which supports both Joomla 5.4+ and Joomla 6+.

Previous major versions for Joomla from 4.4 up to 5.4 are kept in downloads.

The Joomla 6 upgrade path is simple: use previous major version for Joomla 4 & 5 and upgrade to Joomla 5.4. Next ...

The main difference is:
full version can display phpbBB wrapped into Joomla template with custom SEF URLs, specially adopted phpBB style is required. Certain Joomla extensions and phpBB MODs can conflict. Joomla template and phpBB style can have CSS conflicts.

lite version displays phpBB as it is ...

⋅ Feature: new Advanced report setting "Delete PHP Processor" for custom PHP code to delete rows.
⋅ Fix: restored SQL color scheme for report SQL query editor.
⋅ Feature: new advanced report setting "Preload Query" allows to execute a custom query before the main ...

⋅ Change: remove jQuery from frontend scripts.
⋅ Change: Joomla 6 support added.
⋅ Change Joomla 4 support dropped, Joomla 5.4 as min, PHP 8.3 as min.
⋅ Change: K2 integration plugin dropped.
⋅ Feature: new "Alter Glossary - Terms" module added ...

⋅ Feature: new field setting "Default Value" to show the default field value in a list if item value is empty.
⋅ Feature: new plugin setting "Advanced > PCRE Backtrack Limit" to help with parsing large lists of data.
⋅ Fix: display only fields allowed for currently ...